8 Abishai said to David, "God has given your enemy into your hand today; now therefore let me pin him to the ground with one stroke of the spear; I will not strike him twice." 9 But David said to Abishai, "Do not destroy him; for who can raise his hand against the Lord's anointed, and be guiltless?" 10 David said, "As the Lord lives, the Lord will strike him down; or his day will come to die; or he will go down into battle and perish.
Matthew Henry's Commentary on 1 Samuel 26:8-10
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.