Genesis 48:19

But let us see if this people is the heir, or the former, and if the covenant belongs to us or to them. Hear ye now what the Scripture saith concerning the people. Isaac prayed for Rebecca his wife, because she was barren; and she conceived. Furthermore also, Rebecca went forth to inquire of the Lord; and the Lord said to her, “Two nations are in thy womb, and two peoples in thy belly; and the one people shall surpass the other, and the elder shall serve the younger.” You ought to understand who was Isaac, who Rebecca, and concerning what persons He declared that this people should be greater than that. And in another prophecy Jacob speaks more clearly to his son Joseph, saying, “Behold, the Lord hath not deprived me of thy presence; bring thy sons to me, that I may bless them.” And he brought Manasseh and Ephraim, desiring that Manasseh should be blessed, because he was the elder. …

52. O Thou Light, which Tobias saw, when, his eyes being closed, he taught his son the way of life; himself going before with the feet of charity, never going astray. Or that which Isaac saw, when his fleshly “eyes were dim, so that he could not see” by reason of old age; it was permitted him, not knowingly to bless his sons, but in blessing them to know them. Or that which Jacob saw, when he too, blind through great age, with an enlightened heart, in the persons of his own sons, threw light upon the races of the future people, presignified in them; and laid his hands, mystically crossed, upon his grandchildren by Joseph, not as their father, looking outwardly, corrected them, but as he himself distinguished them. This is the light, the only one, and all those who see and love it are one. …

Now, as Isaac’s two sons, Esau and Jacob, furnished a type of the two people, the Jews and the Christians (although as pertains to carnal descent it was not the Jews but the Idumeans who came of the seed of Esau, nor the Christian nations but rather the Jews who came of Jacob’s; for the type holds only as regards the saying, “The elder shall serve the younger”), so the same thing happened in Joseph’s two sons; for the elder was a type of the Jews, and the younger of the Christians. For when Jacob was blessing them, and laid his right hand on the younger, who was at his left, and his left hand on the elder, who was at his right, this seemed wrong to their father, and he admonished his father by trying to correct his mistake and show him which was the elder. But he would not change his hands, but said, “I know, my son, I know. …

34. “And He rejected,” he saith, “the tabernacle of Joseph, and the tribe of Ephraim He chose not” ( ver. 68 ). “And He chose the tribe of Judah” ( ver. 69 ). He hath not said, He rejected the tabernacle of Reuben, who was the first-born son of Jacob; nor them that follow, and precede Judah in order of birth; so that they being rejected and not chosen, the tribe of Judah was chosen. For it might have been said that they were deservedly rejected; because even in the blessing of Jacob wherewith he blessed his sons, he mentioneth their sins, and deeply abhorreth them; though among them the tribe of Levi merited to be the priestly tribe, whence also Moses was. …