And Abraham took Ishmael his son, and all that were born in his house, and all that were bought with his money, every male among the men of Abraham’s house; and circumcised the flesh of their foreskin in the very same day, as God had said to him.
And when a stranger shall sojourn with you, and will keep the passover to the LORD, let all his males be circumcised, and then let him come near and keep it; and he shall be as one that is born in the land: for no uncircumcised person shall eat thereof.
Circumcise yourselves to the LORD, and take away the foreskins of your heart, you men of Judah and inhabitants of Jerusalem: so that my fury does not come forth like fire, and burn so that none can quench it, because of the evil of your doings.
And he gave him the covenant of circumcision: and so Abraham begot Isaac, and circumcised him the eighth day; and Isaac begot Jacob; and Jacob begot the twelve patriarchs.
Whom God has set forth to satisfy justice through faith in his blood, to declare his righteousness for the remission of sins that are past, through the forbearance of God;
As many as desire to make a pleasing show in the flesh, they constrain you to be circumcised; but only so that they do not suffer persecution for the cross of Christ.
Therefore remember that you being in time past Gentiles in the flesh, who are called Uncircumcision by that which is called the Circumcision in the flesh made by hands;
And the LORD your God will circumcise your heart, and the heart of your descendents, to love the LORD your God with all your heart, and with all your soul, that you may live.
And this is the reason why Joshua did circumcise: All the people that came out of Egypt, that were males, even all the men of war, died in the wilderness on the way, after they came out of Egypt.