Titus 3:10–11
10 As for a person who stirs up division, safter warning him once and then twice, thave nothing more to do with him, 11 knowing that such a person is warped and sinful; he is self-condemned.
Titus 3:2
2 zto speak evil of no one, ato avoid quarreling, to be gentle, and bto show perfect courtesy toward all people.