Ahnaf bin Qais said: I entered the mosque of Damascus and saw a man performing many bowings and prostrations. I said to myself that I will not leave until I see whether this person ends his prayer with salam after two rak'ahs or after one rak'ah of witr. When he finished his prayer, I said: O servant of Allah! Did you complete your prayer with two rak'ahs or with one rak'ah of witr? He replied: If I do not know, then Allah Almighty knows. Then he said: I heard my beloved friend Abu al-Qasim Muhammad (peace be upon him) say: Whenever a servant performs a prostration for Allah, Allah raises him one degree and forgives one sin. I said: May Allah have mercy on you, who are you? He said: I am Abu Dharr. Ahnaf said: I considered myself insignificant compared to him.