TSK · Genesis 17:10

Abraham took Ishmael his son, all who were born in his house, and all who were bought with his money; every male among the men of Abraham's house, and circumcised the flesh of their foreskin in the same day, as God had said to him.

Abraham circumcised his son, Isaac, when he was eight days old, as God had commanded him.

Only on this condition will the men consent to us to live with us, to become one people, if every male among us is circumcised, as they are circumcised.

When a stranger shall live as a foreigner with you, and will keep the Passover to Yahweh, let all his males be circumcised, and then let him come near and keep it; and he shall be as one who is born in the land: but no uncircumcised person shall eat of it.

Yahweh your God will circumcise your heart, and the heart of your seed, to love Yahweh your God with all your heart, and with all your soul, that you may live.

This is the reason Joshua circumcised: all the people who came out of Egypt, who were males, even all the men of war, died in the wilderness by the way, after they came out of Egypt.

Behold, the days come, says Yahweh, that I will punish all those who are circumcised in [their] uncircumcision:

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 set forth 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;

since indeed there is one God who will justify the circumcised by faith, and the uncircumcised through faith.

Was anyone called having been circumcised? Let him not become uncircumcised. Has anyone been called in uncircumcision? Let him not be circumcised.

Yes, I testify again to every man who receives circumcision, that he is a debtor to do the whole law.

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);

in whom you were also circumcised with a circumcision not made with hands, in the putting off of the body of the sins of the flesh, in the circumcision of Christ;