Deuteronomy 10:15-16 KJV – Only the LORD had a delight in thy fathers to love them, and he chose their seed after them, even you above all people, as it is this day. Circumcise therefore the foreskin of your heart, and be no more stiffnecked.
Romans 2:29 KJV – But he is a Jew, which is one inwardly; and circumcision is that of the heart, in the spirit, and not in the letter; whose praise is not of men, but of God.
Colossians 2:9-13 KJV – For in him dwelleth all the fulness of the Godhead bodily. And ye are complete in him, which is the head of all principality and power: In whom also ye are circumcised with the circumcision made without hands, in putting off the body of the sins of the flesh by the circumcision of Christ: Buried with him in baptism, wherein also ye are risen with him through the faith of the operation of God, who hath raised him from the dead. And you, being dead in your sins and the uncircumcision of your flesh, hath he quickened together with him, having forgiven you all trespasses;