Acts 7:6-8

But God spoke in this way: that his descendants would dwell in a foreign land, and that they would bring them into bondage and oppress them four hundred years. ‘And the nation to whom they will be in bondage I will judge,’ said God, ‘and after that they shall come out and serve Me in this place.’ Then He gave him the covenant of circumcision; and so Abraham begot Isaac and circumcised him on the eighth day; and Isaac begot Jacob, and Jacob begot the twelve patriarchs.