ISB ~ Acts 15 v1

you cannot be saved:For centuries, circumcision was the rite of initiation into the covenant family of Abraham (Gen 17:9-14) and the Mosaic religion of Israel (Lev 12:3). It was a badge of Jewish identity that entitled one to share in the blessings of the Old Covenant. The absolute necessity of circumcision in Jewish tradition implied that any male who was uncircumcised was destined for destruction (Jubilees 15:26).