Acts 7:6

But God spoke to this effect, that his descendants would be aliens in a foreign land, and that they would be enslaved and mistreated for four hundred years.

Genesis 15:13

God said to Abram, “Know for certain that your descendants will be strangers in a land that is not theirs, where they will be enslaved and oppressed four hundred years.

Genesis 15:16

Then in the fourth generation they will return here, for the iniquity of the Amorite is not yet complete.”

Exodus 12:40-41

Now the time that the sons of Israel lived in Egypt was four hundred and thirty years.

Galatians 3:17

What I am saying is this: 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.

Treasury of Scripture Knowledge

Summary

And God spake on this wise, That his seed should sojourn in a strange land; and that they should bring them into bondage, and entreat them evil four hundred years.

Bible References

That

Genesis 15:13
God said to Abram, “Know for certain that your descendants will be strangers in a land that is not theirs, where they will be enslaved and oppressed four hundred years.

Four

Exodus 12:40
Now the time that the sons of Israel lived in Egypt was four hundred and thirty years.
Galatians 3:17
What I am saying is this: 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.