Sunan an-Nasa'i 1935

Ibrahim ibn Ya‘qub narrated to us, saying: Ahmad ibn Ishaq told me, saying: Wuhayb narrated to us, saying: Mansur ibn ‘Abd al-Rahman narrated to us, from his mother, from ‘A’ishah, who said: Someone who had died was spoken of disparagingly in the Prophet’s presence. He said: ‘Do not speak of your deceased except in good terms.’