He went down to Egypt, compelled by the divine word: God compelled the Israelites to go down to Egypt, the hot bed of idolatry and wizardry, so that the whole world would see the signs and wonders that God performed and come to the realization that even Egypt could not stand up against the power of God. They went down to sojourn there: (And not to remain in Egypt). They only needed to be there until the time came when the world would see God's signs to the Egyptians.