1 Samuel 26:7-9

7 So David and Avishai went to the soldiers by night. Sha’ul was lying there asleep inside the barricade. His spear was stuck in the ground next to his head, with Avner and the troops asleep all around him.

8 Avishai said to David, “God has handed your enemy over to you today; so now, please, let me pin him to the ground with just one stroke of the spear. I won’t strike him a second time.”

9 But David said to Avishai, “Don’t destroy him! Nobody can raise his hand against ADONAI’s anointed without becoming guilty!”