Acts 7:6

And thus God spoke, that his seed shall sojourn in a strange land, and they will enslave it and oppress it four hundred years.

Galatians 3:17

And I say this; The law which was given after four hundred and thirty years, does not disannul the covenant which had been before confirmed of God, so as to make the promise of none effect.

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 I say this; The law which was given after four hundred and thirty years, does not disannul the covenant which had been before confirmed of God, so as to make the promise of none effect.