Titus 3:8-11

This saying is trustworthy. I want you to insist on these things, so that those who have believed God might be careful to devote themselves to good works. These are good and profitable for everyone. But avoid foolish debates, genealogies, quarrels, and disputes about the law, because they are unprofitable and worthless. Reject a divisive person after a first and second warning. For you know that such a person has gone astray and is sinning; he is self-condemned.