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 18:20
And Joab said unto him, thou shall not bear tidings this day,.... Because Joab knew the tidings of Absalom's death would not be acceptable to the king; and Ahimaaz being a good man, and the son of a priest, for whom Joab had a respect, he would not send the tidings by him, which he was sensible would not recommend him to the king:
but thou shalt bear tidings another day; when any salvation is wrought, or victory obtained, the tidings of which will be welcome:
but this day thou shall bear no tidings, because the king's son is dead; and thou must carry the news concerning his death, which it is not proper thou shouldest, being a priest, nor will it be to thine advantage.