2 Samuel 11:14-15
14-15In the morning David wrote a letter to Joab and sent it with Uriah. In the letter he wrote, "Put Uriah in the front lines where the fighting is the fiercest. Then pull back and leave him exposed so that he's sure to be killed."
16-17So Joab, holding the city under siege, put Uriah in a place where he knew there were fierce enemy fighters. When the city's defenders came out to fight Joab, some of David's soldiers were killed, including Uriah the Hittite.