Narrated Abu Huraira: Allah's Apostle 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."
Hadith ReferenceSahih Bukhari / The Book of Al-Jumuah (Friday) / Hadith: 887
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة