Sunan an-Nasa'i, Volume 2, Book 13, Hadith 1323 (DarusSalam) ⓘ
It was narrated from 'Abdullah that: The Prophet 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 " .
also referenced under: Hadith 1322 (Reference) & Book 13, Hadith 144 (In-Book)