Al-Husayn b. Ahmad b. Idris narrated to us. He said: My father narrated to us from Ahmad b. Muhammad b. Khalid from Muhammad b. `Ali al-Kufi from Muhammad b. Sinan from `Isa al-Nahryara from Abi `Abdillah al-Sadiq from his forefathers . He said:

The Messenger of Allah (s) said: Whomever recognizes Allah and His greatness will prevent his lips from speech and his stomach from food, and will support himself with fasting and standing in prayer. They said: May our mothers and our fathers be your sacrifice, O Messenger of Allah! Are these [who fulfill this prescription] the friends of Allah? He said: Surely, the friends of Allah are silent, and their silence becomes reflection; they talk, and their talk is the remembrance [of Allah]; they observe, and their observation is a lesson; they speak, and their speech is wisdom; they walk, and their walking between the people is a blessing. Were it not for the term destined for them, their spirits would not have settled in their bodies out of fear of punishment and out of desire for reward.