25 You are the sons of the prophets and of the covenant that God made with your forefathers,+ saying to Abraham: ‘And by means of your offspring all the families of the earth will be blessed.’+
8 “He also gave him a covenant of circumcision,+ and he became the father of Isaac+ and circumcised him on the eighth day,+ and Isaac became the father of Jacob, and Jacob of the 12 family heads.