Sunan an-Nasa'i 159
سنن النسائي#159Hasanأَخْبَرَنَا عَمْرُو بْنُ عَلِيٍّ، وَإِسْمَاعِيلُ بْنُ مَسْعُودٍ، قَالاَ حَدَّثَنَا يَزِيدُ بْنُ زُرَيْعٍ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنْ عَاصِمٍ، عَنْ زِرٍّ، قَالَ قَالَ صَفْوَانُ بْنُ عَسَّالٍ كُنَّا إِذَا كُنَّا مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم فِي سَفَرٍ أَمَرَنَا أَنْ لاَ نَنْزِعَهُ ثَلاَثًا إِلاَّ مِنْ جَنَابَةٍ وَلَكِنْ مِنْ غَائِطٍ وَبَوْلٍ وَنَوْمٍ .
Safwan bin 'Assal said:"When we were with the Messenger of Allah (ﷺ) on a journey, he told us not to take them off for three days except in the case of Janabah, but not in the case of defecation, urinating or sleep
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: 1:160