Silsilat al-Ahadith al-Sahihah

Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "Four characteristics of the Age of Ignorance will remain in my Ummah; they will never abandon them: (1) wailing (over the dead), (2) casting aspersions on lineage, (3) considering disease to be contagious and saying that a hundred camels got mange because of one mangy camel—so the question is, who gave the first camel mange? and (4) belief in the stars, that is, saying that rain fell because of such-and-such star."