Abu Musa al-Asha'ari · The Book on Jana''iz (Funerals)

"There are four matters in my nation that are from the matters of Jahiliyyah which the people will not leave: Wailing, slandering one's lineage, Al-Adwa - a camel gets mange, so one hundred camels get mange - but who gave the first camel mange? And Al-Anwa (saying): "We got rain because of this or that celestial positioning.'"

The Messenger of Allah said: "Mention good things about your dead, and refrain from (mentioning) their evil."