I Samuel 26:1-8

Now the Ziphites came to Saul at Gibeah, saying, “Is David not hiding in the hill of Hachilah, opposite Jeshimon?” Then Saul arose and went down to the Wilderness of Ziph, having three thousand chosen men of Israel with him, to seek David in the Wilderness of Ziph. And Saul encamped in the hill of Hachilah, which is opposite Jeshimon, by the road. But David stayed in the wilderness, and he saw that Saul came after him into the wilderness. David therefore sent out spies, and understood that Saul had indeed come. So David arose and came to the place where Saul had encamped. And David saw the place where Saul lay, and Abner the son of Ner, the commander of his army. Now Saul lay within the camp, with the people encamped all around him. Then David answered, and said to Ahimelech the Hittite and to Abishai the son of Zeruiah, brother of Joab, saying, “Who will go down with me to Saul in the camp?” And Abishai said, “I will go down with you.” So David and Abishai came to the people by night; and there Saul lay sleeping within the camp, with his spear stuck in the ground by his head. And Abner and the people lay all around him. Then Abishai said to David, “God has delivered your enemy into your hand this day. Now therefore, please, let me strike him at once with the spear, right to the earth; and I will not have to strike him a second time!”