Romans 2:29

Colossians 2:11-12 NIV
In him you were also circumcised with a circumcision not performed by human hands. Your whole self ruled by the flesh was put off when you were circumcised by Christ, having been buried with him in baptism, in which you were also raised with him through your faith in the working of God, who raised him from the dead.

Deuteronomy 10:16 NIV
Circumcise your hearts, therefore, and do not be stiff-necked any longer.

Deuteronomy 30:6 NIV
The Lord your God will circumcise your hearts and the hearts of your descendants, so that you may love him with all your heart and with all your soul, and live.

Philippians 3:3 NIV
For it is we who are the circumcision, we who serve God by his Spirit, who boast in Christ Jesus, and who put no confidence in the flesh—