Mus'ab bin Sa'd narrates from his father, Sayyiduna Sa'd bin Abi Waqqas (may Allah be pleased with him): We were sitting with the Prophet Muhammad (peace be upon him) when he said: Is there anyone among you who can earn one thousand good deeds every day? The people sitting with him asked: O Messenger of Allah! How can any one of us earn one thousand good deeds every day? The Prophet Muhammad (peace be upon him) said: He should recite «سبحان الله» one hundred times, and Allah Almighty will write one thousand good deeds for him and erase one thousand of his sins.