Lady Aisha (may Allah be pleased with her) narrates: Whenever the Prophet Muhammad (peace be upon him) performed any deed, he would do it regularly. When he slept at night or became ill (and thus could not perform the night voluntary prayers), he would offer twelve rak'ahs the next day. Lady Aisha (may Allah be pleased with her) narrates: I never saw the Prophet Muhammad (peace be upon him) performing voluntary prayers for the entire night until dawn, nor did I see him fasting for the whole month in any month except the month of Ramadan.