It was narrated that Abu Hurairah said: "The Messenger of Allah said: 'May Allah have mercy on a man who gets up at night and prays, and wakes his wife, and she prays; and if she refuses he sprinkles water in her face. And May Allah have mercy on a woman who gets up at night and prays, and wakes her husband and he prays; and if he refuses, she sprinkles water in his face."'(Hasan)