Acts 7:6
God spoke to this effect, that his seed would be alien residents in a strange land. They would enslave them, and mistreat them for four hundred years.
Genesis 15:13
Jehovah said to Abram: Know this for sure; your offspring will be strangers (aliens) in a land that is not theirs. They will be slaves there, and they shall be oppressed for four hundred years.
Genesis 15:16
They shall come back here in the fourth generation. The iniquity of the Amorites is not yet complete.
Exodus 12:40-41
The Israelites had been living in Egypt for four hundred and thirty years.
Galatians 3:17
Now this I say: the Law, which came four hundred and thirty years later, does not invalidate a covenant previously ratified by God, so as to nullify the promise.