Sayyiduna Abu Hurairah (may Allah be pleased with him) was present in the house of Sayyidah Umm Darda (may Allah be pleased with her). She narrated that the Noble Prophet (peace and blessings of Allah be upon him) said: "Three things are equivalent to disbelief in Allah: tearing the collar (of one's garment) while lamenting, wailing, and casting aspersions on someone's lineage."