Targum Kejadian 25:23: Targum Jonathan & Targum Jerusalem

And the Lord said to her, Two peoples are in thy womb, and two kingdoms from thy womb shall be separated; and one kingdom shall be stronger than the other, and the elder shall serve the younger, if the children of the younger will keep the commandments of the Law.

My son who hast become great, JOSEPH, my son, who hast become great, and waxed mighty, that thou wouldst become mighty was foreseen. Thee, Joseph, my son, will I liken to a vine planted by fountains of water, which sendeth her roots into the depth and striketh the ridges of the rocks, uplifting herself on high and surmounting all the trees. So hast thou, 0 Joseph my son, risen by thy wisdom above all magicians of Mizraim, and all the wise men who were there, what time thou didst ride in the second chariot of Pharoh, and they proclaimed before thee and said, This is the father of the king, Long live the, father of the king Great in wisdom, though few in years. And the daughters of kings and of princes danced before thee at the windows, and beheld thee from the balconies, and scattered before thee bracelets rings collars, necklaces, and all ornaments of gold, in hope thou wouldst uplift thine eyes and regard one of them. But thou my son Joseph wast far from lifting thine eyes on any one of them, though the daughters of kings and of princes spake one to another, This is the holy man Joseph, who walks not after the sight of his eyes nor after the imagination of his heart; because the sight of the eyes and the imagination of his heart make the son of woman to perish from the world. Therefore will arise from thee the two tribes MENASHEH and EPHRAIM, who shall receive portion and inheritance with their brethren in the dividing of the land.