Pharaoh sends his own invitation. "Take your father and the men of your house, and come to me, and I will give you the best of what is desirable in the land of Mizraim, and you shall eat the fat of the land" (Genesis 45:18). Targum Pseudo-Jonathan preserves the generosity in plain Aramaic.
The phrase chelev ha-aretz, "the fat of the land," is the same idiom the Torah uses when it praises the richest produce. In Deuteronomy, God will use it to describe Canaan itself (Deuteronomy 32:14). Here Pharaoh uses it to describe Egypt. There is an irony the Targum lets stand: the fat of Mizraim is what welcomes the family, and the thin famine years will pass under its shelter, but eventually the same land will turn into a house of bondage.
For now, the invitation is lavish. Pharaoh gives the brothers permission to move. He offers them the best pasture, the best provisions, the protection of the royal house. Joseph's family will settle in Goshen — fertile grazing land in the eastern Nile Delta — by the end of this chapter.
The sages note that Pharaoh's generosity here is real but transactional. He wants Joseph's loyalty. The best way to secure a vizier is to welcome his whole family into the kingdom. A ruler whose relatives are hostages to his protection is a ruler who will not rebel.
Still, in the Targum's reading, this moment belongs to the Holy One. Pharaoh speaks the words, but the Shechinah is the one guiding the entire migration. The fat of Egypt today is the mother's milk of the future Israelite nation, the shelter under which the twelve tribes will grow from seventy souls into six hundred thousand fighting men by the time of the Exodus (Exodus 12:37). God feeds His people first. Then He frees them.