2 Samuel 11:1-2
David Commits Adultery with Bathsheba
11:1 In the spring of the year, at the time when kings normally conduct wars, David sent out Joab with his officers and the entire Israelite army. They defeated the Ammonites and besieged Rabbah. But David stayed behind in Jerusalem.
11:2 One evening David got up from his bed and walked around on the roof of his palace. From the roof he saw a woman bathing. Now this woman was very attractive.