Sunan an-Nasa'i 1322
سنن النسائي#1322Sahihأَخْبَرَنَا 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 " .
It was narrated from 'Abdullah that: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)
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 13:144