Unto {i} Shem also, the father of all the children of {k} Eber, the brother of Japheth the elder, even to him were children born.

(i) In his stock the Church was preserved: therefore Moses stops speaking of Japheth and Ham, and speaks of Shem extensively.

(k) Of whom came the Hebrews or Jews.

Wesley's Notes

10:21 Two things especially are observable in this account of the posterity of Shem. The description of Shem, Ge 10:21, we have not only his name, Shem, which signifies a name; but two titles to distinguish him by. He was the father of all the children of Eber. Eber was his great grandson, but why should he be called the father of all his children, rather than of all Arphaxad's or Salah's? Probably because Abraham and his seed, not only descended from Heber, but from him were called Hebrews. Eber himself, we may suppose, was a man eminent for religion in a time of general apostasy; and the holy tongue being commonly called from him the Hebrew, it is probable he retained it in his family in the confusion of Babel, as a special token of God's favour to him. He was the brother of Japheth the elder; by which it appears, that though Shem be commonly put first, yet he was not Noah's first - born, but Japheth was elder. But why should this also be put as part of Shem's description, that he was the brother of Japheth, since that had been said before? Probably this is intended to signify the union of the Gentiles with the Jews in the church. He had mentioned it as Shem's honour, that he was the father of the Hebrews; but lest Japheth's seed should therefore be looked upon as shut out from the church, he here minds us, that he was the brother of Japheth, not in birth only, but in blessing, for Japheth was to dwell in the tents of Shem. The reason of the name of Peleg, Ge 10:25, because, in his days, (that is, about the time of his birth) was the earth divided among the children of men that were to inhabit it; either when Noah divided it, by an orderly distribution of it, as Joshua divided the land of Canaan by lot, or when, upon their refusal to comply with that division, God, in justice, divided them by the confusion of tongues.

Jamieson-Fausset-Brown Bible Commentary

21. Unto Shem-The historian introduces him with marked distinction as "the father of Eber," the ancestor of the Hebrews.

Matthew Henry's Concise Commentary

10:15-32 The posterity of Canaan were numerous, rich, and pleasantly seated; yet Canaan was under a Divine curse, and not a curse causeless. Those that are under the curse of God, may, perhaps, thrive and prosper in this world; for we cannot know love or hatred, the blessing or the curse, by what is before us, but by what is within us. The curse of God always works really, and always terribly. Perhaps it is a secret curse, a curse to the soul, and does not work so that others can see it; or a slow curse, and does not work soon; but sinners are reserved by it for a day of wrath Canaan here has a better land than either Shem or Japheth, and yet they have a better lot, for they inherit the blessing. Abram and his seed, God's covenant people, descended from Eber, and from him were called Hebrews. How much better it is to be like Eber, the father of a family of saints and honest men, than the father of a family of hunters after power, worldly wealth, or vanities. Goodness is true greatness.