(10) باب مَا يَفْعَلُ إِذَا قَامَ مِنَ اللَّيْلِ مِنَ السِّوَاكِ
It was narrated that Hudhaifah said:
"When the Messenger of Allah (ﷺ) got up to pray tahajjud at night, he would brush his teeth with the siwak. (ID)
Reference (ID): Sunan an-Nasa'i 1622 (ID)
In-book reference (ID): Book 20, Hadith 25 (ID)
English translation (ID): Vol. 2, Book 20, Hadith 1623 (ID)