Sunan an-Nasa'i 90
سنن النسائي#90Sahihأَخْبَرَنَا مُحَمَّدُ بْنُ زُنْبُورٍ الْمَكِّيُّ، قَالَ حَدَّثَنَا ابْنُ أَبِي حَازِمٍ، عَنْ يَزِيدَ بْنِ عَبْدِ اللَّهِ، أَنَّ مُحَمَّدَ بْنَ إِبْرَاهِيمَ، حَدَّثَهُ عَنْ عِيسَى بْنِ طَلْحَةَ، عَنْ أَبِي هُرَيْرَةَ، عَنْ رَسُولِ اللَّهِ صلى الله عليه وسلم قَالَ " إِذَا اسْتَيْقَظَ أَحَدُكُمْ مِنْ مَنَامِهِ فَتَوَضَّأَ فَلْيَسْتَنْثِرْ ثَلاَثَ مَرَّاتٍ فَإِنَّ الشَّيْطَانَ يَبِيتُ عَلَى خَيْشُومِهِ " .
It was narrated from Abu Hurairah that the Messenger of Allah (ﷺ) said:"When any one of you wakes from sleep to perform Wudu', then let him sniff water in his nose and blow it out three times, for the Shaitan spends the night on his nose
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: 1:90