τετρακόσιοι

Some time ago Theudas rose up, claiming to be somebody, and about four hundred men joined him. He was killed, all his followers were dispersed, and it all came to nothing.

God told him that his descendants would be foreigners in a strange land, and that they would be enslaved and mistreated four hundred years.

All this took about 450 years. After this, God gave them judges until the time of Samuel the prophet.

What I mean is this: The law that came 430 years later does not revoke the covenant previously established by God, so as to nullify the promise.