Imam Ja‘far al-Ṣadiq (as): There are twelve distinctive features to brushing one s teeth: it is a recommended prophetic practice, it purifies one s mouth, brightens one s eyesight, pleases the Beneficent Lord, whitens the teeth, does away with wretchedness, strengthens one s gums, whets one s appetite for food, takes away phlegm, improves one s memory, multiplies one s rewards for good deeds, and gives pleasure to the angels. al-Kāfī