Riyad as-Salihin

The Book of Virtues — Hadith #518

Riyad as-Salihin:The Book of Virtues:Hadith 518
وعن حذيفة رضي الله عنه، قال‏:‏ كان رسول الله صلى الله عليه وسلم، إذا قام من النوم يشوص فاه بالسواك‏.‏ ‏(‏‏(‏متفق عليه‏)‏‏)‏

Whenever the Messenger of Allah (ﷺ) got up (from sleep), he would rub his teeth with Miswak (tooth-stick)..