World Wide Study Bible
a Bible passage
23 “When he was forty years old, it came into his heart to visit his relatives, the Israelites.
23-27. In Ac 7:23, 30, 36, the life of Moses is represented as embracing three periods, of forty years each; the Jewish writers say the same; and though this is not expressly stated in the Old Testament, his age at death, one hundred twenty years (De 34:7), agrees with it.
it came into his heart to visit his brethren—his heart yearning with love to them as God's chosen people, and heaving with the consciousness of a divine vocation to set them free.