25 Now therefore, please pardon my sin, and turn again with me, that I may worship Yahweh.” 26 Samuel said to Saul, “I will not return with you; for you have rejected the word of Yahweh, and Yahweh has rejected you from being king over Israel.” 27 As Samuel turned about to go away, Saul grabbed the skirt of his robe, and it tore. 28 Samuel said to him, “Yahweh has torn the kingdom of Israel from you this day, and has given it to a neighbor of yours who is better than you. 29 Also the Strength of Israel will not lie nor repent; for he is not a man, that he should repent.” 30 Then he said, “I have sinned: yet honor me now, please, before the elders of my people, and before Israel, and come back with me, that I may worship Yahweh your God.” 31 So Samuel went back with Saul; and Saul worshiped Yahweh.

32 Then said Samuel, “Bring here to me Agag the king of the Amalekites!”

Agag came to him cheerfully. Agag said, “Surely the bitterness of death is past.” 33 Samuel said, “As your sword has made women childless, so your mother will be childless among women!” Samuel cut Agag in pieces before Yahweh in Gilgal. 34 Then Samuel went to Ramah; and Saul went up to his house to Gibeah of Saul. 35 Samuel came no more to see Saul until the day of his death; for Samuel mourned for Saul: and Yahweh grieved that he had made Saul king over Israel.

Matthew Henry's Commentary on 1 Samuel 15:25-42

Commentary on 1 Samuel 15:24-31

(Read 1 Samuel 15:24-31)

There were several signs of hypocrisy in Saul's repentance. 1. He besought Samuel only, and seemed most anxious to stand right in his opinion, and to gain his favour. 2. He excuses his fault, even when confessing it; that is never the way of a true penitent. 3. All his care was to save his credit, and preserve his interest in the people. Men are fickle and alter their minds, feeble and cannot effect their purposes; something happens they could not foresee, by which their measures are broken; but with God it is not so. The Strength of Israel will not lie.

Commentary on 1 Samuel 15:32-35

(Read 1 Samuel 15:32-35)

Many think the bitterness of death is past when it is not gone by; they put that evil day far from them, which is very near. Samuel calls Agag to account for his own sins. He followed the example of his ancestors' cruelty, justly therefore is all the righteous blood shed by Amalek required. Saul seems unconcerned at the token of God's displeasure which he lay under, yet Samuel mourns day and night for him. Jerusalem was carnally secure while Christ wept over it. Do we desire to do the whole will of God? Turn to him, not in form and appearance, but with sincerity.