It is narrated from Sayyida Aisha (may Allah be pleased with her) that when Sayyida Hawla bint Tuwait (may Allah be pleased with her) passed by the Messenger of Allah (peace and blessings be upon him), it was said to him, "O Messenger of Allah! This woman prays a lot at night, and when sleep overcomes her, she ties herself with a rope and hangs (to keep awake)." The Messenger of Allah (peace and blessings be upon him) said: "She should pray as long as she has strength, but when she becomes drowsy, she should go to sleep."