Circumcision in the Bible begins in Genesis 17 when God commands Abraham to circumcise every male as a sign of the Abrahamic covenant. For centuries, this physical mark distinguished God's people Israel and signified their covenant relationship with Him. Under the Mosaic Law, circumcision was required on the eighth day after birth. However, even in the Old Testament, prophets like Moses (Deuteronomy 10:16) and Jeremiah (4:4) spoke of circumcision of the heart—the inward reality the outward sign was meant to represent. The pivotal shift came in Acts 15 at the Jerusalem Council, where the early church determined that Gentile believers did not need physical circumcision to be saved. Paul argued passionately in Galatians that requiring circumcision for salvation was a denial of grace—Galatians 5:6 declares that in Christ Jesus neither circumcision nor uncircumcision counts for anything, but only faith working through love. Romans 2:29 defines true circumcision as a matter of the heart by the Spirit. This transition from external sign to internal reality illustrates the new covenant's emphasis on faith over ritual.