(186) بَابُ الطَّعْنِ فِي الأَنْسَابِ
Abu Hurayra reported that the Prophet, may Allah bless him andgrant him peace, said, "There are two courses that my Community will notabandon:
wailing and attacking a person's lineage."
Reference: Al-Adab Al-Mufrad 395
In-book reference: Book 21, Hadith 11
English translation: Book 21, Hadith 395