Hudhayfah reported: When the Prophet, peace and blessings be upon him, arose at night, he would clean his mouth with the toothstick.
Source: Ṣaḥīḥ al-Bukhārī 243, Ṣaḥīḥ Muslim 255
Grade: Muttafaqun Alayhi (authenticity agreed upon) according to Al-Bukhari and Muslim
عَنْ حُذَيْفَةَ قَالَ كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِذَا قَامَ مِنْ اللَّيْلِ يَشُوصُ فَاهُ بِالسِّوَاكِ
243 صحيح البخاري كتاب الوضوء باب السواك
255 صحيح مسلم كتاب الطهارة باب السواك