The Book of Forgetfulness (In Prayer)
13/82. Chapter:
Remembrance after seeking forgiveness
Sunan an-Nasai
أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ الأَعْلَى، وَمُحَمَّدُ بْنُ إِبْرَاهِيمَ بْنِ صُدْرَانَ، عَنْ خَالِدٍ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنْ عَاصِمٍ، عَنْ عَبْدِ اللَّهِ بْنِ الْحَارِثِ، عَنْ عَائِشَةَ، - رضى الله عنها أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ إِذَا سَلَّمَ قَالَ " اللَّهُمَّ أَنْتَ السَّلاَمُ وَمِنْكَ السَّلاَمُ تَبَارَكْتَ يَا ذَا الْجَلاَلِ وَالإِكْرَامِ " .
It was narrated from 'Aishah that : After saying the taslim the Messenger of Allah (ﷺ) would say: "Allahumma anta as-salam wa minka as-salam tabarakta ya dhal-jalali wal-ikram (O Allah, You are the source of eace (or the One free from all faults) and from You comes peace, blessed are You, O Possessor of Majesty and Honor)."
Reference : Sunan an-Nasa'i 1338In-book reference : Book 13, Hadith 160English translation : Vol. 2, Book 13, Hadith 1339