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21. The Birth of Isaac

1 Now the LORD was gracious to Sarah as he had said, and the LORD did for Sarah what he had promised. 2 Sarah became pregnant and bore a son to Abraham in his old age, at the very time God had promised him. 3 Abraham gave the name Isaac Isaac means he laughs. to the son Sarah bore him. 4 When his son Isaac was eight days old, Abraham circumcised him, as God commanded him. 5 Abraham was a hundred years old when his son Isaac was born to him.

    6 Sarah said, “God has brought me laughter, and everyone who hears about this will laugh with me.” 7 And she added, “Who would have said to Abraham that Sarah would nurse children? Yet I have borne him a son in his old age.”

Hagar and Ishmael Sent Away

    8 The child grew and was weaned, and on the day Isaac was weaned Abraham held a great feast. 9 But Sarah saw that the son whom Hagar the Egyptian had borne to Abraham was mocking, 10 and she said to Abraham, “Get rid of that slave woman and her son, for that woman’s son will never share in the inheritance with my son Isaac.”

    11 The matter distressed Abraham greatly because it concerned his son. 12 But God said to him, “Do not be so distressed about the boy and your slave woman. Listen to whatever Sarah tells you, because it is through Isaac that your offspring Or seed will be reckoned. 13 I will make the son of the slave into a nation also, because he is your offspring.”

    14 Early the next morning Abraham took some food and a skin of water and gave them to Hagar. He set them on her shoulders and then sent her off with the boy. She went on her way and wandered in the Desert of Beersheba.

    15 When the water in the skin was gone, she put the boy under one of the bushes. 16 Then she went off and sat down about a bowshot away, for she thought, “I cannot watch the boy die.” And as she sat there, she Hebrew; Septuagint the child began to sob.

    17 God heard the boy crying, and the angel of God called to Hagar from heaven and said to her, “What is the matter, Hagar? Do not be afraid; God has heard the boy crying as he lies there. 18 Lift the boy up and take him by the hand, for I will make him into a great nation.”

    19 Then God opened her eyes and she saw a well of water. So she went and filled the skin with water and gave the boy a drink.

    20 God was with the boy as he grew up. He lived in the desert and became an archer. 21 While he was living in the Desert of Paran, his mother got a wife for him from Egypt.

The Treaty at Beersheba

    22 At that time Abimelek and Phicol the commander of his forces said to Abraham, “God is with you in everything you do. 23 Now swear to me here before God that you will not deal falsely with me or my children or my descendants. Show to me and the country where you now reside as a foreigner the same kindness I have shown to you.”

    24 Abraham said, “I swear it.”

    25 Then Abraham complained to Abimelek about a well of water that Abimelek’s servants had seized. 26 But Abimelek said, “I don’t know who has done this. You did not tell me, and I heard about it only today.”

    27 So Abraham brought sheep and cattle and gave them to Abimelek, and the two men made a treaty. 28 Abraham set apart seven ewe lambs from the flock, 29 and Abimelek asked Abraham, “What is the meaning of these seven ewe lambs you have set apart by themselves?”

    30 He replied, “Accept these seven lambs from my hand as a witness that I dug this well.”

    31 So that place was called Beersheba, Beersheba can mean well of seven and well of the oath. because the two men swore an oath there.

    32 After the treaty had been made at Beersheba, Abimelek and Phicol the commander of his forces returned to the land of the Philistines. 33 Abraham planted a tamarisk tree in Beersheba, and there he called on the name of the LORD, the Eternal God. 34 And Abraham stayed in the land of the Philistines for a long time.


1. And the Lord visited Sarah. In this chapters not only is the nativity of Isaac related, but because, in his very birth, God has set before us a lively picture of his Church, Moses also gives a particular account of this matter. And first, he says that God visited Sarah, as he had promised. Because all offspring, flows from the kindness of God, as it is in the psalm,

‘The fruit of the womb is the gift of God;’ (Psalm 127:3;)

therefore the Lord is said, not without reason, to visit those, to whom he gives children. For although the foetus seems to be produced naturally, each from its own kind; there is yet no fecundity in animals, except so far as the Lord puts forth his own power, to fulfill what he has said, Increase and multiply. But in the propagation of the human race, his special benediction is conspicuous; and, therefore, the birth of every child is rightly deemed the effect of divine visitation. But Moses, in this place, looks higher, forasmuch as Isaac was born out of the accustomed course of nature.433433     Calvin here adds, “Nam communis gignendi ratio, et vis illa quam Dominus hominibus indidit, in Abraham et ejus uxore cessaverat.” Therefore Moses here commends that secret and unwonted power of God, which is superior to the law of nature; and not improperly, since it is of great consequence for us to know that the gratuitous kindness of God reigned, as well in the origin, as in the progress of the Church; and that the sons of God were not otherwise born, than from his mere mercy. And this is the reason why he did not make Abraham a father, till his body was nearly withered. It is also to be noticed, that Moses declares the visitation which he mentions, to be founded upon promise; ‘Jehovah visited Sarah, as he had promised.’ In these words he annexes the effect to its cause, in order that the special grace of God, of which an example is given in the birth of Isaac, might be the more perceptible. If he had barely said, that the Lord had respect unto Sarah, when she brought forth a son; some other cause might have been sought for. None, however, can doubt, that the promise, by which Isaac had been granted to his father Abraham, was gratuitous; since the child was the fruit of that adoption, which can be ascribed to nothing but the mere grace of God. Therefore, whoever wishes rightly and prudently to reflect upon the work of God, in the birth of Isaac, must necessarily begin with the promise. There is also great emphasis in the repetition, “The Lord did unto Sarah as he had spoken.” For he thus retains his readers, as by laying his hand upon them, that they may pause in the consideration of so great a miracle. Meanwhile, Moses commends the faithfulness of God; as if he had said he never feeds men with empty promises, nor is he less true in granting what he has promised, than he is liberal, and willing, in making the promise.

2. She bare Abraham a son. This is said according to the accustomed manner of speaking; because the woman is neither the head of a family, nor brings forth properly for herself, but for her husband. What follows, however, is more worthy of notice, In his old age, at the set time, which God had predicted: for the old age of Abraham does, not a little, illustrate the glory of the miracle. And now Moses, for the third time, recalls us to the word of God, that the constancy of his truth may always be present to our minds. And though the time had been predicted, alike to Abraham and to his wife, yet this honor is expressly attributed to the holy man; because the promise had been especially given on his account. Both, however, are distinctly mentioned in the context.

3. And Abraham called the name. Moses does not mean that Abraham was the inventor of the name; but that he adhered to the name which before had been given by the angel. This act of obedience, however, was worthy of commendation, since he not only ratified the word of God, but also executed his office as God’s minister. For, as a herald, he proclaimed to all, that which the angel had committed to his trust.

4. And Abraham circumcised his son. Abraham pursued his uniform tenor of obedience, in not sparing his own son. For, although it would be painful for him to wound the tender body of the infant; yet, setting aside all human affection, he obeys the word of God. And Moses records that he did as the Lord had commanded him; because there is nothing of greater importance, than to take the pure word of God for our rule, and not to be wise above what is lawful. This submissive spirit is especially required, in reference to sacraments; lest men should either invent any thing for themselves, or should transfer those things which are commanded by the Lord, to any use they please. We see, indeed, how inordinately the humours of men here prevail; inasmuch as they have dared to devise innumerable sacraments. And to go no further for an example, whereas God has delivered only two sacraments to the Christian Church, the Papists boast that they have seven. As if truly it were in their power to forge promises of salvation, which they might sanction with signs imagined by themselves. But it were superfluous to relate with how many figments the sacraments have been polluted by them. This certainly is manifest, that there is nothing about which they are less careful, than to observe what the Lord has commanded.

5. And Abraham was an hundred years old. Moses again records the age of Abraham the better to excite the minds of his readers to a consideration of the miracle. And although mention is made only of Abraham, let us yet remember that he is, in this place, set before us, not as a man of lust, but as the husband of Sarah, who has obtained, through her, a lawful seed, in extreme old age, when the strength of both had failed. For the power of God was chiefly conspicuous in this, that when their marriage had been fruitless more than sixty years, suddenly they obtain offspring434434     Quod quum ultra sexaginta annos sterile illis fuisset conjugium, effoetis jam et semimortuis, subito nata est prolis.” . Sarah, truly, in order to make amends for the doubt to which she had given way, now exultingly proclaims the kindness of God, with becoming praises. And first, she says, that God had given her occasion of joy; not of common joy, but of such as should cause all men to congratulate her. Secondly, for the purpose of amplification, she assumes the character of an astonished inquirer, ‘Who would have told this to Abraham?’ Some explain the clause in question, ‘will laugh at me,’ as if Sarah had said, with shame, that she should be a proverb to the common people. But the former sense is more suitable; namely, ‘Whosoever shall hear it, will laugh with me;’ that is, for the sake of congratulating me.

7. Who would have said unto Abraham, that Sarah should have given children suck ? I understand the future tense to be here put for the subjunctive mood. And the meaning is, that such a thing would never have entered into the mind of any one. Whence she concludes, that God alone was the Author of it; and she now condemns herself for ingratitude because she had been so slow in giving credit to the angel who had told her of it. Now, since she speaks of children in the plural number, the Jews, according to their custom, invent the fable, that whereas a rumor was spread, that the child was supposititious, a great number of infants were brought by the neighbors, in order that Sarah, by suckling them, might prove herself a mother. As if, truly, this might not easily be known, when they saw Isaac hanging on her breast,435435     It is here added, “Ac non clarior, et in promptu fuerit demonstratio, si lac digitis expressum ante oculos fluxisset.” and as if this was not a more clear and distinct proof, that the milk, pressed out by the fingers, flowed before their eyes. But the Jews are doubly foolish and infatuated, as not perceiving, that this form of expression is of exactly the same import, as if Sarah had called herself a nurse. Meanwhile, it is to be observed, that Sarah joins the office of nurse with that of mother; for the Lord does not in vain prepare nutriment for children in their mothers’ bosoms, before they are born. But those on whom he confers the honor of mothers, he, in this way, constitutes nurses; and they who deem it a hardship to nourish their own offspring, break, as far as they are able, the sacred bond of nature. If disease, or anything of that kind, is the hindrance, they have a just excuse; but for mothers voluntarily, and for their own pleasure, to avoid the trouble of nursing, and thus to make themselves only half-mothers, is a shameful corruption.


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