Cross-references Explore similar Bible verses on Genesis 21:4 in English Standard Version "And Abraham circumcised his son Isaac when he was eight days old, as God had commanded him." Ge 17:10 This is my covenant, which you shall keep, between me and you and your offspring after you: Every male among you shall be circumcised. Ge 17:12 He who is eight days old among you shall be circumcised. Every male throughout your generations, whether born in your house or bought with your money from any foreigner who is not of your offspring, Ac 7:8 And he gave him the covenant of circumcision. And so 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.