Question 38: Is it permissible for a woman to offer Qiyaam-ul-Layl (optional Prayer at night) and Tahajjud (optional late night Prayer) without her husband’s permission when he is present? Bear in mind that she only offers themafter her husband is asleep. She also took his permission once to observe supererogatory Sawm (fasting), and he agreed and told her she can perform any act of religious devotion. Should she take his permission again, or is the first time enough?
Answer: Firstly, a woman should keep up Qiyaam-ul-Layl and encourage her husband to keep it up. It is related by Aboo Daawood and Al-Nasaa’ee that the Prophet (peace be upon him) said, “May Allaah show mercy to a man who wakes up at night, offers Prayers, and wakes his wife up. And if she refuses to wake up, he sprinkles water on her face. May Allaah show mercy to a woman who wakes up at night, offers Prayers, and wakes her husband up. And if he refuses to wake up, she sprinkles water on his face.”... read more here.