12-55 Abul Hussein Muhammad ibn Ali ibn ash-Shah narrated that Abu Hamid Ahmad ibn Muhammad ibn al-Hussein quoted on the authority of Abu Yazid Ahmad ibn Khalid al-Khalidy, on the authority of Muhammad ibnAhmad ibn Salih al-Tamimy, on the authority of his father, on the authority of Anas ibn Muhammad Abu Malik, on the authority of his father, on the authority of Ja’far ibn Muhammad as-Sadiq (MGB), on the authority of his father (MGB), on the authority of his grandfather (MGB), on the authority of Ali ibn Abi Talib (MGB) that in his will to Ali (MGB) God’s Prophet (MGB) said, “O Ali!

“O Ali! Brushing the teeth with a toothbrush is a recommendable practice since it cleans the mouth; improves vision; pleases the Merciful Lord; whitens the teeth; removes the mouth’s bad smell; strengthens the gums; stimulates the appetite; alleviates the phlegm; improves memory; increases the good deeds; and makes the angels happy.”