Lady Aisha Siddiqa (may Allah be pleased with her) narrates: The wife of Sayyiduna Uthman bin Maz'oon (may Allah be pleased with him) came; her name was Khawla bint Hakim. She came to Lady Aisha (may Allah be pleased with her), and her condition was bad. Lady Aisha (may Allah be pleased with her) asked her: What has happened to you? She replied: My husband spends the whole night in voluntary prayers and fasts during the day. (During this time) the Prophet Muhammad (peace and blessings be upon him) came to Lady Aisha (may Allah be pleased with her). Lady Aisha (may Allah be pleased with her) mentioned this matter to him. Then the Prophet Muhammad (peace and blessings be upon him) met Sayyiduna Uthman bin Maz'oon (may Allah be pleased with him), and the Prophet (peace and blessings be upon him) said: "O Uthman! Monasticism has not been made obligatory upon us. Is there not the best example for you in my way? By Allah! I fear Allah more than all of you and I am most mindful of His limits among you."