Musnad Ahmad 30:2499

Yahya narrated to us, from Ibn ‘Ajlan, he said: Al-Qa‘qa‘ ibn Hakim narrated to me, from Abu Salih, from Abu Hurayrah, he said: The Messenger of Allah, peace and blessings of Allah be upon him, said: "May Allah have mercy on a man who stood at night and prayed, and woke his wife, and she prayed; and if she refused, he sprinkled water on her face. And may Allah have mercy on a woman who stood at night and woke her husband, and he prayed; and if he refused, she sprinkled water on his face."