At the same time David sent messengers to Ishbaal, son of Saul, to say, “Give me my wife Michal, whom I betrothed by paying a hundred Philistine foreskins.”
If any alien residing among you would celebrate the Passover for the Lord, all his males must be circumcised, and then he may join in its celebration just like the natives. But no one who is uncircumcised may eat of it.
Then he gave him the covenant of circumcision, and so he became the father of Isaac, and circumcised him on the eighth day, as Isaac did Jacob, and Jacob the twelve patriarchs.
And he received the sign of circumcision as a seal on the righteousness received through faith while he was uncircumcised. Thus he was to be the father of all the uncircumcised who believe, so that to them [also] righteousness might be credited,