Sunan an-Nasa'i 441
سنن النسائي#441Sahihأَخْبَرَنَا عِمْرَانُ بْنُ يَزِيدَ، قَالَ حَدَّثَنَا إِسْمَاعِيلُ بْنُ عَبْدِ اللَّهِ، قَالَ حَدَّثَنَا الأَوْزَاعِيُّ، قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ مُسْلِمٍ الزُّهْرِيُّ، قَالَ حَدَّثَنِي سَعِيدُ بْنُ الْمُسَيَّبِ، قَالَ حَدَّثَنِي أَبُو هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " إِذَا قَامَ أَحَدُكُمْ مِنَ اللَّيْلِ فَلاَ يُدْخِلْ يَدَهُ فِي الإِنَاءِ حَتَّى يُفْرِغَ عَلَيْهَا مَرَّتَيْنِ أَوْ ثَلاَثًا فَإِنَّ أَحَدَكُمْ لاَ يَدْرِي أَيْنَ بَاتَتْ يَدُهُ " .
Abu Hurairah said:"The Messenger of Allah (ﷺ) said: 'When any one of you gets up after (sleeping) at night, let him not put his hand into the vessel until he has poured water on it two or three times, for none of you knows where his hand spent the night
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: 4:47