Sunan an-Nasa'i 38

سنن النسائي#38Sahih

أَخْبَرَنَا 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 — 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:

Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiDaif

In-book reference: 1:38