TSK · Exodus 12:40

Now Yahweh said to Abram, "Get out of your country, and from your relatives, and from your father's house, to the land that I will show you.

God spoke in this way: that his seed would live as aliens in a strange land, and that they would be enslaved and mistreated for four hundred years.

Now the promises were spoken to Abraham and to his seed. He doesn't say, "To seeds," as of many, but as of one, "To your seed," which is Christ.