Qays said, "I heard Mu'awiya say to a young brother of his, 'Mount
your slave behind you.' He refused. Mu'awiya said to him, 'How badly you
have been taught!' I heard Abu Sufyan say, 'leave your brother alone.'"
Musa ibn 'Ali reported from his father that 'Amr ibn al-'As said,
"When you have a lot of close friends, you have a lot of creditors." The
transmitter asked Musa, "What are creditors?" "Rights owed," he replied.