World Wide Study Bible
a Bible passage
8 And as Jannes and Jambres resisted Moses This comparison confirms what I have already said about the “last times”, for he means that the same thing happens to us under the gospel, which the Church experienced almost from her very commencement, or at least since the law was published. In like manner the Psalmist also speaks largely about the unceasing battles of the Church.
“Often did they fight against me from my youth, now let Israel say. The wicked ploughed upon my back, they made long their furrows.” (Psalm 129:1,3)
Paul reminds us, that we need not wonder if adversaries rise up against Christ to oppose his gospel, since Moses likewise had those who contended with him; for these examples drawn from a remote antiquity yield us strong consolation.
It is generally believed; that the two who are mentioned, “Jannes and Jambres,” were magicians put forward by Pharaoh. But from what source Paul learned their names is doubtful, except that it is probable, that many things relating to those histories were handed down, the memory of which God never permitted to perish. It is also possible that in Paul’s time there were commentaries on the prophets that gave more fully those narratives which Moses touches very briefly. However that may be, it is not at random that he calls them by their names. The reason why there were two of them may be conjectured to have been this, that, because the Lord had raised up for his people two leaders, Moses and Aaron, Pharaoh determined to place against them the like number of magicians.