عَنْ عَائِشَةَ أُمِّ الْمُؤْمِنِينَ رَضِيَ اللَّهُ عَنْهَا أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ كَانَ إِذَا سَلَّمَ مِنَ الصَّلَاةِ قَالَ: ((اللَّهُمَّ أَنْتَ السَّلَامُ وَمِنْكَ السَّلَامُ تَبَارَكْتَ يَا ذَا الْجَلَالِ وَالْإِكْرَامِ))
It is narrated from Umm al-Mu'minin Sayyida Aisha (may Allah be pleased with her) that when the Messenger of Allah (peace and blessings be upon him) would finish the prayer with salam, he used to recite this supplication: "O Allah, You are Peace and from You is peace. Blessed are You, O Possessor of Majesty and Honor."