Philippians 3:2-3

Look out for the dogs [the Judaizers, the legalists], look out for the troublemakers, look out for the false circumcision [those who claim circumcision is necessary for salvation]; for we [who are born-again have been reborn from above—spiritually transformed, renewed, set apart for His purpose and] are the true circumcision, who worship in the Spirit of God and glory and take pride and exult in Christ Jesus and place no confidence [in what we have or who we are] in the flesh