5 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 captain of his army: and Saul lay within the place of the wagons, and the people were encamped around him.
6 Then answered David and said to Ahimelech the Hittite, and to Abishai the son of Zeruiah, brother to Joab, saying, “Who will go down with me to Saul to the camp?”
Abishai said, “I will go down with you.” 7 So David and Abishai came to the people by night: and, behold, Saul lay sleeping within the place of the wagons, with his spear stuck in the ground at his head; and Abner and the people lay around him. 8 Then said Abishai to David, “God has delivered up your enemy into your hand this day. Now therefore please let me strike him with the spear to the earth at one stroke, and I will not strike him the second time.” 9 David said to Abishai, “Don’t destroy him; for who can put forth his hand against Yahweh’s anointed, and be guiltless?” 10 David said, “As Yahweh lives, Yahweh will strike him; or his day shall come to die; or he shall go down into battle and perish. 11 Yahweh forbid that I should put forth my hand against Yahweh’s anointed; but now please take the spear that is at his head, and the jar of water, and let us go.” 12 So David took the spear and the jar of water from Saul’s head; and they went away: and no man saw it, nor knew it, neither did any awake; for they were all asleep, because a deep sleep from Yahweh was fallen on them.
Matthew Henry's Commentary on 1 Samuel 26:5-12
Commentary on 1 Samuel 26:1-12
(Read 1 Samuel 26:1-12)
How soon do unholy hearts lose the good impressions convictions have made upon them! How helpless were Saul and all his men! All as though disarmed and chained, yet nothing is done to them; they are only asleep. How easily can God weaken the strongest, befool the wisest, and baffle the most watchful! David still resolved to wait till God thought fit to avenge him on Saul. He will by no means force his way to the promised crown by any wrong methods. The temptation was very strong; but if he yielded, he would sin against God, therefore he resisted the temptation, and trusted God with the event.