Abraham took Ishmael his son, all who were born in his house, and all who were bought with his money: every male amongst the men of Abraham’s house, and circumcised the flesh of their foreskin in the same day, as God had said to him.
Only on this condition will the men consent to us to live with us, to become one people, if every male amongst us is circumcised, as they are circumcised.
When a stranger lives as a foreigner with you, and would like to keep the Passover to the LORD, let all his males be circumcised, and then let him come near and keep it. He shall be as one who is born in the land; but no uncircumcised person shall eat of it.
Circumcise yourselves to the LORD, and take away the foreskins of your heart, you men of Judah and inhabitants of Jerusalem; lest my wrath go out like fire, and burn so that no one can quench it, because of the evil of your doings.
He gave him the covenant of circumcision. So Abraham became the father of Isaac, and circumcised him the eighth day. Isaac became the father of Jacob, and Jacob became the father of the twelve patriarchs.
whom God sent to be an atoning sacrifice through faith in his blood, for a demonstration of his righteousness through the passing over of prior sins, in God’s forbearance;
Therefore remember that once you, the Gentiles in the flesh, who are called “uncircumcision” by that which is called “circumcision” (in the flesh, made by hands),
The LORD your God will circumcise your heart, and the heart of your offspring, to love the LORD your God with all your heart and with all your soul, that you may live.
This is the reason Joshua circumcised them: all the people who came out of Egypt, who were males, even all the men of war, died in the wilderness along the way, after they came out of Egypt.