"Nawf bin Fizala Bakali, the famous scholar of the early Islamic days says that one night he was with Imam Ali. In the middle of the night, Imam Ali got up from his bed, looked for sometime at the stars and inquired of Nawf whether he was awake. Nawf said: "I got from my bed replying, "Yes, Amirul Mo'minin (Commander of the Faithful) ! I am awake"."