Matthew Henry on 2 Samuel 18:9-18
Here is Absalom quite at a loss, at his wit's end first, and then at his life's end. He that began the fight, big with the expectation of triumphing over David himself, with whom, if he had had him in his power, he would not have dealt gently, is now in the greatest consternation, when he meets the servants of David, Sa2 18:9. Though they were forbidden to meddle with him, he durst not look them in the face; but, finding they were near him, he clapped spurs to his mule and made the best of his way, through thick and thin, and so rode headlong upon his own destruction. Thus he that fleeth from the fear shall fall into the pit, and he that getteth up out of the pit shall be taken in the snare,…
Read the whole note in the consoleJamieson-Fausset-Brown on 2 Samuel 18:16
Joab blew the trumpet, . . . and held back the people--Knowing that by the death of the usurper there was no occasion for further bloodshed, he put an end to the pursuit and thereby evinced the temperate policy of his conduct. However harsh and unfeeling to the king Joab may appear, there can be no doubt that he acted the part of a wise statesman in regarding the peace and welfare of the kingdom more than his master's private inclinations, which were opposed to strict justice as well as his own interests. Absalom deserved to die by the divine law (Deu 21:18, Deu 21:21), as well as being an enemy to his king and country; and no time was more fitting than when he met that death in open battle.
Adam Clarke on 2 Samuel 18:16
Joab blew the trumpet - He knew that the rebellion was now extinguished by the death of Absalom; and was not willing that any farther slaughter should be made of the deluded people.
John Gill on 2 Samuel 18:16
And Joab blew the trumpet,.... As the sign of a retreat:
and the people returned from pursuing after Israel; upon the sound of the trumpet, the meaning of which they understood:
for Joab held back the people: from shedding any more blood; the head of the conspiracy being removed, the thing would be crushed at once; and Joab neither chose to slay any more, nor take any prisoners, to be tried as traitors, being unawares, without thought, drawn into this rebellion.