God spoke to him in this way: ‘For four hundred years your descendants will be strangers in a country not their own, and they will be enslaved and mistreated.
Then the Lord said to him, “Know for certain that for four hundred years your descendants will be strangers in a country not their own and that they will be enslaved and mistreated there.
What I mean is this: The law, introduced 430 years later, does not set aside the covenant previously established by God and thus do away with the promise.