1403 - Abu 'Abd Allah narrated to us, he said: Muhammad ibn 'Ubayd narrated to us, he said: Al-A'mash narrated to us, from Abu Salih, from Abu Hurayrah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Two things in people are disbelief: wailing over the dead, and slandering a person's lineage."