1 Samuel 26:1-8

Then the Ziphites came to Saul at Gibeah, saying, “Is not David hiding himself on the hill of Hachilah, which is on the east of Jeshimon?” So Saul arose and went down to the wilderness of Ziph with three thousand chosen men of Israel to seek David in the wilderness of Ziph. And Saul encamped on the hill of Hachilah, which is beside the road on the east of Jeshimon. But David remained in the wilderness. When he saw that Saul came after him into the wilderness, David sent out spies and learned that Saul had indeed come. Then David rose and came to the place where Saul had encamped. And David saw the place where Saul lay, with Abner the son of Ner, the commander of his army. Saul was lying within the encampment, while the army was encamped around him. Then David said to Ahimelech the Hittite, and to Joab’s brother Abishai the son of Zeruiah, “Who will go down with me into the camp to Saul?” And Abishai said, “I will go down with you.” So David and Abishai went to the army by night. And there lay Saul sleeping within the encampment, with his spear stuck in the ground at his head, and Abner and the army lay around him. Then Abishai said to David, “God has given your enemy into your hand this day. Now please let me pin him to the earth with one stroke of the spear, and I will not strike him twice.”