II Samuel 11:1-2

It happened in the spring of the year, 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 people of Ammon and besieged Rabbah. But David remained at Jerusalem. Then it happened one evening that David arose from his bed and walked on the roof of the king’s house. And from the roof he saw a woman bathing, and the woman was very beautiful to behold.