Allah's Messenger (ﷺ) said, "I have told you repeatedly to use the Siwak. (The Prophet (ﷺ) put emphasis on the use of the Siwak.)
Sahih al-Bukhari Book 11, Hadith 13
← Previous Hadith Allah's Messenger (ﷺ) said, "If I had not found it hard for my followers or the people, I would have ordered them to clean their teeth with Siwak for every prayer."

Sahih al-Bukhari Book 11, Hadith 12 Next Hadith → When the Prophet (p.b.u.h) got up at night (for the night prayer), he used to clean his mouth .

Sahih al-Bukhari Book 11, Hadith 14