Al-Adab Al-Mufrad #1293
Recognition
Bilal ibn Sa'd al-Ash'ari related that Mu'awiya wrote to Abu Dharr,
"Write down for me the deviants of Damascus." Abu Dharr said, "What do
I have to do with the deviants of Damascus and how would I know them?"
His son Bilal said, "I will write them," so he wrote them. Abu Dharr said,
"How do you know? You would only know that they are deviants if you were
one of them. Begin with yourself and do not send their names."
About Al-Adab Al-Mufrad
This hadith is #1293 from Al-Adab Al-Mufrad, in the Book of Recognition. Al-Adab Al-Mufrad contains 1,326 hadiths across 57 books.