Yahya related to me from Malik from Ismail from Ibn Abi Hakimthat he had heard that the Messenger of Allah, may Allah bless him andgrant him peace, heard a woman praying at night. He said, "Who isthat?" and someone said to him,"It is al-Hawla bint Tuwayt, she doesnot sleep in the night." The Messenger of Allah, may Allah bless himand grant him peace, disapproved of that and his disapproval showed inhis face. Then he said, "Allah, the Blessed and Exalted, does notbecome weary, but you become weary. Take on whatever is within yourcapability."
App reference: Book 7, Hadith 4
USC-MSA web (English) reference: Book 7, Hadith 5
Arabic reference: Book 7, Hadith 258