Galatians 3:17
What I mean 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.
Acts 7:6-7
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.
Acts 7:17
"But as the time of the promise drew near, which God had granted to Abraham, the people increased and multiplied in Egypt
Hebrews 11:8-13
By faith Abraham obeyed when he was called to go out to a place which he was to receive as an inheritance; and he went out, not knowing where he was going.