Genesis 17:10-14
This is My covenant with you and your descendants after you, which you are to keep: Every male among you must be circumcised. / You are to circumcise the flesh of your foreskin, and this will be a sign of the covenant between Me and you. / Generation after generation, every male must be circumcised when he is eight days old, including those born in your household and those purchased from a foreigner—even those who are not your offspring. ...

Exodus 4:25-26
But Zipporah took a flint knife, cut off her son’s foreskin, and touched it to Moses’ feet. “Surely you are a bridegroom of blood to me,” she said. / So the LORD let him alone. (When she said, “bridegroom of blood,” she was referring to the circumcision.)

Leviticus 12:3
And on the eighth day the flesh of the boy’s foreskin is to be circumcised.

Deuteronomy 10:16
Circumcise your hearts, therefore, and stiffen your necks no more.

Jeremiah 4:4
Circumcise yourselves to the LORD, and remove the foreskins of your hearts, O men of Judah and people of Jerusalem. Otherwise, My wrath will break out like fire and burn with no one to extinguish it, because of your evil deeds.”

Romans 2:28-29
A man is not a Jew because he is one outwardly, nor is circumcision only outward and physical. / No, a man is a Jew because he is one inwardly, and circumcision is a matter of the heart, by the Spirit, not by the written code. Such a man’s praise does not come from men, but from God.

Galatians 5:2-3
Take notice: I, Paul, tell you that if you let yourselves be circumcised, Christ will be of no value to you at all. / Again I testify to every man who gets himself circumcised that he is obligated to obey the whole law.

Colossians 2:11-12
In Him you were also circumcised, in the putting off of your sinful nature, with the circumcision performed by Christ and not by human hands. / And having been buried with Him in baptism, you were raised with Him through your faith in the power of God, who raised Him from the dead.

Acts 7:8
Then God gave Abraham the covenant of circumcision, and 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.

Genesis 34:14-17
“We cannot do such a thing,” they said. “To give our sister to an uncircumcised man would be a disgrace to us. / We will consent to this on one condition, that you become circumcised like us—every one of your males. / Then we will give you our daughters and take your daughters for ourselves. We will dwell among you and become one people. ...

Ezekiel 44:7-9
In addition to all your other abominations, you brought in foreigners uncircumcised in both heart and flesh to occupy My sanctuary; you defiled My temple when you offered My food—the fat and the blood; you broke My covenant. / And you have not kept charge of My holy things, but have appointed others to keep charge of My sanctuary for you.’ / This is what the Lord GOD says: No foreigner uncircumcised in heart and flesh may enter My sanctuary—not even a foreigner who lives among the Israelites.

Philippians 3:3
For it is we who are the circumcision, we who worship by the Spirit of God, who glory in Christ Jesus, and who put no confidence in the flesh—

1 Corinthians 7:18-19
Was a man already circumcised when he was called? He should not become uncircumcised. Was a man still uncircumcised when called? He should not be circumcised. / Circumcision is nothing and uncircumcision is nothing. Keeping God’s commandments is what counts.

Acts 15:1-2
Then some men came down from Judea and were teaching the brothers, “Unless you are circumcised according to the custom of Moses, you cannot be saved.” / And after engaging these men in sharp debate, Paul and Barnabas were appointed, along with some other believers, to go up to Jerusalem to see the apostles and elders about this question.

Genesis 21:4
When his son Isaac was eight days old, Abraham circumcised him, as God had commanded him.