It is narrated from Hazrat Abu Umamah (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) organized an army (in which I was also present). I came to the service of the Noble Prophet (peace and blessings be upon him) and said, "O Messenger of Allah! Pray to Allah for martyrdom on my behalf." The Noble Prophet (peace and blessings be upon him) prayed, "O Allah! Keep him safe and grant him spoils of war." Thus, we returned safe and sound with the spoils of war. (When the army was organized again, I made the same request and the Noble Prophet (peace and blessings be upon him) made the same prayer.) The third time when the army was organized, I came to the service of the Noble Prophet (peace and blessings be upon him) and said, "O Messenger of Allah! I have already come to you twice before, and I requested you to pray to Allah for martyrdom on my behalf, but you prayed for safety and spoils of war, and we returned safe and sound with the spoils of war. Therefore, O Messenger of Allah! Now pray for martyrdom for me." But the Noble Prophet (peace and blessings be upon him) again prayed for safety and spoils of war, and we returned safe and sound with the spoils of war. After that, I came to the service of the Noble Prophet (peace and blessings be upon him) and said, "Command me to do some deed." The Noble Prophet (peace and blessings be upon him) said, "Make fasting obligatory upon yourself, for you will meet (Allah) in the state of fasting." And if during the day smoke was seen rising from their house, people would understand that today a guest has come to them. Hazrat Abu Umamah (may Allah be pleased with him) says that I continued to act upon this for a long time, as long as Allah willed. Then I came to the court of the Messenger (peace and blessings be upon him) and said, "O Messenger of Allah! You had commanded me to fast. I hope that Allah has granted us its blessings. Now tell me another deed." The Noble Prophet (peace and blessings be upon him) said, "Be certain that if you perform one prostration for Allah, Allah will, by its blessing, raise your rank by one degree and forgive one sin."