Sunan an-Nasa'i 2
Sahih Graded by Abu Ghuddah Book of The Book of Purification · Hadith 2 of 5,758أَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، وَقُتَيْبَةُ بْنُ سَعِيدٍ، عَنْ جَرِيرٍ، عَنْ مَنْصُورٍ، عَنْ أَبِي وَائِلٍ، عَنْ حُذَيْفَةَ، قَالَ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم إِذَا قَامَ مِنَ اللَّيْلِ يَشُوصُ فَاهُ بِالسِّوَاكِ .
Narrated by Huthaifah said
It was narrated that Huthaifah said:"When the Messenger of Allah (ﷺ) got up at night, he would brush his mouth with the Siwak
References
Sunan an-Nasa'i 2
In-book: Book 1, Hadith 2 Source: hadith-api (fawazahmed0)