Galatians 6:13-16

For even the circumcised [Jews] themselves do not [really] keep the Law, but they want to have you circumcised so that they may boast in your flesh [that is, in the fact that they convinced you to be circumcised]. But far be it from me to boast [in anything or anyone], except in the cross of our Lord Jesus Christ, through whom the world has been crucified to me, and I to the world. For neither is circumcision anything [of any importance], nor uncircumcision, but [only] a new creation [which is the result of a new birth—a spiritual transformation—a new nature in Christ Jesus]. Peace and mercy be upon all who walk by this rule [who discipline themselves and conduct their lives by this principle], and upon the [true] Israel of God (Jewish believers). [Ps 125:5]