Acts 7:6-8

6God told him that his descendants would be foreigners in a strange land, and that they would be enslaved and mistreated four hundred years. 7‘But I will punish the nation that enslaves them,’ God said, ‘and afterward they will come forth and worship Me in this place.’1

8Then God gave Abraham the covenant of circumcision, and Abraham became the father of Isaac and circumcised him on the eighth day. And Isaac became the father of Jacob, and Jacob of the twelve patriarchs.