(380) بَابُ
Qays said, "I heard Mu'awiya say to a young brother of his, 'Mountyour slave behind you.' He refused. Mu'awiya said to him, 'How badly youhave been taught!' I heard Abu Sufyan say, 'leave your brother alone.'"
Reference: Al-Adab Al-Mufrad 854
In-book reference: Book 35, Hadith 13
English translation: Book 35, Hadith 854