2 Samuel 11:1-2

Then it happened in the spring, at the time when kings go out to battle, that David sent Joab and his servants with him and all Israel, and they destroyed the sons of Ammon and besieged Rabbah. But David stayed at Jerusalem. Now when evening came David arose from his bed and walked around on the roof of the king’s house, and from the roof he saw a woman bathing; and the woman was very beautiful in appearance.