Bible Notes Online - 2-Samuel 18 - ESV
Commentary

v1-2: David's army was much smaller than Absalom's, yet his leaders were more experienced.

v3: David had said that he would fight with the army. But the people, maintaining a great respect for him, insisted that he stay in the city, Mahanaim, 17.27.

v4: David was still referred to as the king; there are five references in v1-5. Even though many had rejected him, David was still the true king. Even though any reject Christ, He is still the Lord, the Son of God. We are confident that He will take His rightful place.

v5: David was full of graciousness, in spite of Absalom's deceit. His specific command was witnessed by the whole army; Joab later disobeyed this.

All Absalom wanted to do was to kill David; all David wanted to do was to save Absalom.

We see too a picture of God's love for the prodigal, since He always maintains love for His own.

v6-8: The battle spread over a wide area, but Absalom's army was routed.

v9: Absalom, unwisely, was alone; he "happened" to meet some of David's army; his downfall was his head, indicating his pride (14.25-26).

v10-15: Joab was a man of zeal, and harshness, and hatred; he never showed forgiveness. He killed those who stood in his way; Abner, Amnon, Absalom; and each one was cruelly killed. The command was clear, "be gentle" (v5) (in Judg 4.21, Jael came "quietly" to kill Sisera).

The soldier who first saw Absalom showed more integrity than Joab, refusing his gifts, and seeking to honour David's words.

v16-18: Joab threw Absalom's body into a big pit.

Absalom's life was wasted; he desired power, but died defenceless in a tree. The only reminder of his life was his "Monument"; like Ahaz's sundial; no life of godliness, no record of personal prayer, no great achievement. It seems his three sons had died (14.27). Such a contrast with his father.

v19-30: Ahimaaz was the son of Zadok; see 15.27, 36 where they were instructed to bring information about Absalom to David. He was normally a bringer of good news. He brought news of the victory, but knew nothing about Absalom.

v31-33: The Cushite did bring news of Absalom's death. David's response was deep genuine sorrow; an example of concern for one's dearest and nearest, Matt 9.18; 15.22; 17.15; John 4.47, 49. Cain's original question is answered; "I am my brother's keeper".