2 Samuel 11:14-17

14And it came to pass in the morning, that David wrote a letter to Joab, and sent it by Urijah.

15And he wrote in the letter saying, Set Urijah in the front of the thickest fight, and withdraw from him, that he may be smitten and die.

16And it came to pass as Joab watched the city, that he assigned Urijah to a place where he knew that the valiant men were.

17And the men of the city went out and fought with Joab; and there fell some of the people, of the servants of David; and Urijah the Hittite died also.