ISB ~ John 7 v22

circumcision:A sign of the Abrahamic covenant (Gen 17:10-14) that was later incorporated into the Mosaic covenant (Lev 12:3). According to Jewish tradition, the duty to circumcise newborn boys on the eighth day overrides the duty to observe the Sabbath rest when it falls on the same day. Jesus reasons that if part of the body may be lawfully tended to, then how much more should the whole body participate in the blessings of the covenant on the Sabbath (7:23) (CCC 2173).