Compiled by Imam Yahya ibn Sharaf al-Nawawi
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).[Al-Bukhari and Muslim].