Acts 7:6

And God spoke in this manner: "That his posterity should sojourn in a foreign land, and that they would bring them into bondage, and illtreat them four hundred years;

Galatians 3:17

And what I mean is this; that a covenant that was before ratified by God, the Law, which came four hundred and thirty years after, cannot annul, so as to make void 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

Four

Galatians 3:17
And what I mean is this; that a covenant that was before ratified by God, the Law, which came four hundred and thirty years after, cannot annul, so as to make void the promise;