Some Muslims consider witr compulsory while others consider it supererogatory. Whether an act is supererogatory or obligatory can be debated. Fatima used to be regular in this supererogatory prayer. The supererogatory morning prayer has many names. Some schools of moral philosophy do not include supererogatory acts. My servant never ceases drawing near to Me through supererogatory works until I love him. In many schools of thought, donating money to charity is supererogatory.