Silsilat al-Ahadith al-Sahihah

Amr bin Shu'aib narrates from his father, who narrates from his grandfather, and he from Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him), that he said: The companions mentioned a man to the Messenger of Allah (peace and blessings of Allah be upon him), saying: He does not eat until he is fed, and he does not ride until he is made to ride. The Prophet (peace and blessings of Allah be upon him) said: "You have backbitten him." The companions said: O Messenger of Allah! We only mentioned (the fault) that is present in him. He (peace and blessings of Allah be upon him) said: "(For backbiting) it is sufficient that you mention about your brother that (fault) which is in him."