Warrad, the scribe of al-Mughira ibn Shu'ba, said, "Mu'awiya wrote
to al-Mughira, saying, 'Write down for me what you heard the Messenger
of Allah, may Allah bless him and grant him peace, say.' So he wrote to
him, 'The Prophet of Allah, may Allah bless him and grant him peace, used
to say at the end of every prayer, "There is no god but Allah alone with
no partner. His is the Kingdom and His is the praise and He has power over
everything. O Allah, none can withhold what You give nor can anyone give
what You withhold. Nor will the wealth of someone with wealth help him
against You.' He also write to him, 'He forbade gossip, asking too many
questions, and wasting money. He forbade disobeying mothers, burying daughters
alive, and he forbade asking people (without real need).'"