On silence Except when Speaking what is Good, Abandonment of what does not concern one, and Slander — Hadith 13

13. Al-Naḍr ibn Suwayd narrated from ʿĀṣim ibn Ḥumayd, from Abū Jaʿfar (a) whom he heard saying, “Verily the good deed that brings the quickest reward is kindness, and the evil deed that brings the quickest punishment is unjust aggression. And it is sufficient as a flaw for a person to look at those faults in others which he turns a blind eye to in himself, and to censure the people for that which he is [himself] incapable of abandoning, and to disturb the one who sits with him by [discussing] that which does not concern him. ”