Sunan an-Nasa'i 406
سنن النسائي#406Sahihأَخْبَرَنِي إِبْرَاهِيمُ بْنُ يَعْقُوبَ، قَالَ حَدَّثَنَا النُّفَيْلِيُّ، قَالَ حَدَّثَنَا زُهَيْرٌ، قَالَ حَدَّثَنَا عَبْدُ الْمَلِكِ، عَنْ عَطَاءٍ، عَنْ يَعْلَى، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم رَأَى رَجُلاً يَغْتَسِلُ بِالْبَرَازِ فَصَعِدَ الْمِنْبَرَ فَحَمِدَ اللَّهَ وَأَثْنَى عَلَيْهِ وَقَالَ " إِنَّ اللَّهَ عَزَّ وَجَلَّ حَلِيمٌ حَيِيٌّ سِتِّيرٌ يُحِبُّ الْحَيَاءَ وَالسَّتْرَ فَإِذَا اغْتَسَلَ أَحَدُكُمْ فَلْيَسْتَتِرْ " .
It was narrated from Ya'la that the Messenger of Allah (ﷺ) saw a man performing Ghusl in an open place, so he ascended the Minbar and praised and glorified Allah, then he said:'Allah, the Mighty and Sublime, is forbearing, modest and concealing, and He loves modesty and concealment. When any one of you performs Ghusl, let him conceal himself
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: 4:11