(81) باب الاِسْتِغْفَارِ بَعْدَ التَّسْلِيمِ
Thawban, the freed slave of the Messenger of Allah (ﷺ), narrated that:
When he finished the prayer, the Messenger of Allah (ﷺ) would pray for forgiveness three times and say: 'Allahumma anta asalam, 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)." (ES)
Reference (ES): Sunan an-Nasa'i 1337 (ES)
In-book reference (ES): Book 13, Hadith 159 (ES)
English translation (ES): Vol. 2, Book 13, Hadith 1338 (ES)