II Samuel 11:14-16

In the morning it happened that David wrote a letter to Joab and sent it by the hand of Uriah. And he wrote in the letter, saying, “Set Uriah in the forefront of the hottest battle, and retreat from him, that he may be struck down and die.” So it was, while Joab besieged the city, that he assigned Uriah to a place where he knew there were valiant men.