Romans 2:25
It is true that circumcision is of use if you keep the law, but if you go against the law it is as if you had it not.
Jeremiah 4:4
Undergo a circumcision of the heart, you men of Judah and people of Jerusalem: or my wrath may come out like fire, burning so that no one is able to put it out, because of the evil of your doings.
Deuteronomy 30:6
And the Lord your God will give to you and to your seed a circumcision of the heart, so that, loving him with all your heart and all your soul, you may have life.
Jeremiah 9:25-26
See, the day is coming, says the Lord, when I will send punishment on all those who have circumcision in the flesh;
Acts 7:51
You whose hearts are hard and whose ears are shut to me; you are ever working against the Holy Spirit; as your fathers did, so do you.
Romans 2:23
You who take pride in the law, are you doing wrong to the honour of God by behaviour which is against the law?
Romans 2:28-2
The true Jew is not one who is only so publicly, and circumcision is not that which may be seen in the flesh:
Romans 4:11-12
And he was given the sign of circumcision as a witness of the faith which he had before he underwent circumcision: so that he might be the father of all those who have faith, though they have not circumcision, and so that righteousness might be put to their account;
Galatians 5:3-6
Yes, I give witness again to every man who undergoes circumcision, that he will have to keep all the law.
Galatians 6:15
For having circumcision is nothing, and not having circumcision is nothing, but only a new order of existence.
Ephesians 2:11-12
For this reason keep it in mind that in the past you, the Gentiles in the flesh, who are looked on as being outside the circumcision by those who have circumcision, in the flesh, made by hands;