Matthew Henry on 2 Samuel 18:19–end
Absalom's business is done; and we are now told,
I. How David was informed of it. He staid behind at the city of Mahanaim, some miles from the wood where the battle was, and in the utmost border of the land. Absalom's scattered forces all made homeward toward Jordan, which was the contrary way from Mahanaim, so that his watchmen could not perceive how the battle went, till an express came on purpose to bring advice of the issue, which the king sat in the gate expecting to hear, Sa2 18:24.
1. Cushi was the man Joab ordered to carry the tidings (Sa2 18:21), an Ethiopian, so his name signifies, and some think that he was so by birth, a black that waited on Joab, probably one of the ten that had…
Read the whole note in the consoleJamieson-Fausset-Brown on 2 Samuel 18:19
Then said Ahimaaz . . . Let me . . . run and bear the king tidings--The reasons why Joab declined to accept Ahimaaz' offer to bear intelligence of the victory to David, and afterwards let him go along with another, are variously stated by commentators--but they are of no importance. Yet the alacrity of the messengers, as well as the eager excitement of the expectants, is graphically described.
Adam Clarke on 2 Samuel 18:18
Reared up for himself a pillar - There was a marble pillar in the time of Josephus called Absalom's pillar: and there is one shown to the present day under this name; but it is comparatively a modern structure.
Absalom's place - Literally Absalom's Hand. See the note on Sa1 15:12.
John Gill on 2 Samuel 18:19
Then said Ahimaaz the son of Zadok,.... To Joab; for it seems he stayed with the army when he with Jonathan brought the message from Hushai to David:
let me now run, and bear the king tidings how that the Lord hath avenged him on his enemies; which he thought would be very acceptable to hear of as soon as possible; and to be a messenger with tidings of a victory, as it was honourable, so likewise profitable then as now; though perhaps Ahimaaz might have no respect to the reward, as indeed none could be expected, since the death of Absalom would be so disagreeable to the king; but was desirous of it, that the king might be acquainted with the event of the battle as soon as might be.