On silence Except when Speaking what is Good, Abandonment of what does not concern one, and Slander — Hadith 16

16. Ḥammād ibn ʿĪsā narrated from Shuʿayb al-ʿAqarqūfī, from Abū Baṣīr, from Abū ʿAbdillāh (a) who said, “Once, when the Messenger of Allah (ṣ) was with [his wife] ʿĀʾishah, a man sought permission to see him. So the Messenger of Allah (ṣ) said, ‘What a bad brother of the tribe [he is]! ’ ʿĀʾishah stood up and entered the inner chamber, and the Prophet (ṣ) allowed the man to enter. As he came in, the Prophet (ṣ) went to meet him and he spoke to him until he had said what he came to say and left. So ʿĀʾishah said to him, ‘O Messenger of Allah, you mentioned him in that way, yet you still welcomed him with a smile on your face? ’ So he said to her, ‘Verily among the worst servants of Allah is one whose company is disliked because of his foul-mouthedness. ’”