Sunan an-Nasa'i #1322 · The Book of Forgetfulness (In Prayer)

Sunan an-Nasa'iIt was narrated from 'Abdullah that
Sunan an-Nasa'i · Book 13 · The Book of Forgetfulness (In Prayer)
Sunan an-Nasa'i · كتاب 13 · كتاب السهو
The Prophet (ﷺ) said: "It is as if I can see the whiteness of his cheek, saying to his right: As-salamu 'alaykum wa rahmatullah (peace be upon you and the mercy of Allah) and to his left: As-salamu 'alaykum wa rahmatullah (peace be upon you and the mercy of Allah)." (Sahih)
أَخْبَرَنَا زَيْدُ بْنُ أَخْزَمَ، عَنِ ابْنِ دَاوُدَ، - يَعْنِي عَبْدَ اللَّهِ بْنَ دَاوُدَ الْخُرَيْبِيَّ - عَنْ عَلِيِّ بْنِ صَالِحٍ، عَنْ أَبِي إِسْحَاقَ، عَنْ أَبِي الأَحْوَصِ، عَنْ عَبْدِ اللَّهِ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ كَأَنِّي أَنْظُرُ إِلَى بَيَاضِ خَدِّهِ عَنْ يَمِينِهِ ‏
"‏ السَّلاَمُ عَلَيْكُمْ وَرَحْمَةُ اللَّهِ ‏"‏ ‏.‏ وَعَنْ يَسَارِهِ ‏"‏ السَّلاَمُ عَلَيْكُمْ وَرَحْمَةُ اللَّهِ ‏"‏ ‏.‏
Reference : Sunan an-Nasa'i 1322In-book reference : Book 13, Hadith 144