The freed slave of the Messenger of Allah (peace be upon him), Sayyiduna Thawban (may Allah be pleased with him), narrates that when the Messenger of Allah (peace be upon him) finished the prayer, he would recite « أَسْـتَغْفِرُ الله » three times, then say, « اللّهُـمَّ أَنْـتَ السَّلامُ وَمِـنْكَ السَّلام تَبارَكْتَ يا ذا الجَـلالِ وَالإِكْـرام » "O Allah, You are Peace, and from You comes peace. Blessed are You, O Possessor of Majesty and Honor." Janab Amr bin Hisham narrated from Imam Awza'i that he mentioned this supplication before saying the salam.