Sunan an-Nasa'i 38
سنن النسائي#38Sahihأَخْبَرَنَا مُحَمَّدُ بْنُ بَشَّارٍ، قَالَ حَدَّثَنَا مُعَاذُ بْنُ مُعَاذٍ، قَالَ أَنْبَأَنَا سَعِيدٌ، عَنْ قَتَادَةَ، عَنِ الْحَسَنِ، عَنْ حُضَيْنٍ أَبِي سَاسَانَ، عَنِ الْمُهَاجِرِ بْنِ قُنْفُذٍ، أَنَّهُ سَلَّمَ عَلَى النَّبِيِّ صلى الله عليه وسلم وَهُوَ يَبُولُ فَلَمْ يَرُدَّ عَلَيْهِ السَّلاَمَ حَتَّى تَوَضَّأَ فَلَمَّا تَوَضَّأَ رَدَّ عَلَيْهِ .
It was narrated from Al-Muhajir bin Qunfudh that he greeted the Prophet (ﷺ) with Salam while he was urinating, and he did not return the greeting until he had performed Wudu'. When he had performed Wudu' he returned the greeting
Scholarly Authentication
The label above is the grade most of these scholars gave, each scholar counted once — 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. When they judged only its chain of narrators (“Isnaad”), the label says “Sound chain”. Each scholar's own wording:
Our source also lists this ruling under Abu Ghuddah, the editor of the printed edition it was taken from. It is al-Albani's ruling printed again, so it is counted once.
In-book reference: 1:38