Acts 3:25

3:25 You are the sons of the prophets and of the covenant that God made with your ancestors, saying to Abraham, ‘And in your descendants all the nations of the earth will be blessed.’

Acts 7:8

7:8 Then God gave Abraham the covenant of circumcision, and so he became the father of Isaac and circumcised him when he was eight days old, and Isaac became the father of Jacob, and Jacob of the twelve patriarchs.