1 Samuel 26:8-10

8“God has surely handed your enemy over to you this time!” Abishai whispered to David. “Let me pin him to the ground with one thrust of the spear; I won’t need to strike twice!”

9“No!” David said. “Don’t kill him. For who can remain innocent after attacking the Lord’s anointed one?

10Surely the Lord will strike Saul down someday, or he will die of old age or in battle.