Al-Amālī 1, narration 102

Translation

Abu Ja`far Muhammad b. Ali b. al-Husayn b. Musa b. Babuwayh al-Qummi narrated to us. He said: Ja`far b. `Ali b. al-Hasan b. `Ali b. `Abdullah b. al-Mughira al-Kufi narrated to us. He said: My grandfather al-Hasan b. `Ali narrated to us from his grandfather Abdullah b. al-Mughira from Isma`il b. Abi Ziyad from al-Sadiq Ja`far b. Muhammad from his father from his forefathers (as). He said: The Messenger of Allah (s) said to his companions: Should I not tell you something, that if you do it, Satan would be as far away from you as the East is from the West? They said: Of course. He said: Fasting blackens his face, charity breaks his back, loving for the sake of Allah and putting an effort into performing righteous deeds cuts his tail, and repentance cuts his artery. Everything has a purifier, and the purifier of the bodies is fasting.

Translation: Bilal Muhammad — published with the edition, reproduced verbatim.