1 Samuel 26:7-8

7 So David and Abishai went among Saul's army that night. They saw that Saul was asleep in the middle of the camp. He had pushed his spear into the ground near his head. Abner and the army were asleep around Saul. 8 Abishai said to David, ‘Tonight God has given your enemy into your power. I will push Saul's spear through his body and fix him to the ground. I will only have to do it once to kill him. I will not need to do it again.’