Acts 7:5-8

5And he gave him no inheritance in it, no, not so much as to set his foot on: yet he promised that he would give it to him for a possession, and to his offspring after him, when as yet he had no child.

6And God spoke in this way, That his offspring should sojourn in a foreign land; and that they should bring them into bondage, and oppress them four hundred years.

7And the nation to whom they shall be in bondage will I judge, said God: and after that they shall come forth, and serve me in this place.

8And he gave him the covenant of circumcision: and so Abraham begat Isaac, and circumcised him the eighth day; and Isaac begat Jacob; and Jacob begat the twelve patriarchs.