(30) باب السِّوَاكِ لِمَنْ قَامَ مِنَ اللَّيْلِ
Narrated Hudhaifah:
When the Apostle of Allaah (sal Allaahu alayhi wa sallam) got up during the night (to pray), he cleansed his mouth with the tooth-stick.
Reference: Sunan Abi Dawud 55
In-book reference: Book 1, Hadith 55
English translation: Book 1, Hadith 54