2 Samuel 11:13-15

13And when David had called him, he ate and drank before him; and he made him drunk: and at evening he went out to lie on his bed with the servants of his lord, but went not down to his house.

14And it came to pass in the morning, that David wrote a letter to Joab, and sent it by the hand of Uriah. 15And he wrote in the letter, saying, Set ye Uriah in the front line of the hottest battle, and retire ye from him, that he may be smitten, and die.12