Philippians 3:2

3:2 Beware of the dogs, beware of the evil workers, beware of those who mutilate the flesh!

Titus 1:10-11

1:10 For there are many rebellious people, idle talkers, and deceivers, especially those with Jewish connections, 1:11 who must be silenced because they mislead whole families by teaching for dishonest gain what ought not to be taught.