It is narrated from Sayyiduna Abdur Rahman bin Awf (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: Indeed, Allah Almighty has made the fasting of Ramadan obligatory, and I have made its night prayer a Sunnah. So whoever fasts during it and stands (in prayer) seeking reward, he will emerge from sins as the day his mother gave birth to him.