But howsoever, said he, let me run. And he said unto him, Run. Then Ahimaaz ran by the way of the plain, and overran Cushy.

Jamieson-Fausset-Brown Bible Commentary

23. by the way of the plain-or ciccar, "circle." This word is only used elsewhere in connection with the valley of the Jordan. It is possible that there may have been a place or region so called on the tablelands of Gilead, as the Septuagint seems to indicate. Or Mahanaim may have been so situated, with the regard to the battlefield, as to be more easily accessible by a descent to the plain of the Jordan, than over the hills themselves. Or the word may signify (as Ewald explains) a manner of quick running [Stanley].

Matthew Henry's Concise Commentary

18:19-33 By directing David to give God thanks for his victory, Ahimaaz prepared him for the news of his son's death. The more our hearts are fixed and enlarged, in thanksgiving to God for our mercies, the better disposed we shall be to bear with patience the afflictions mixed with them. Some think David's wish arose from concern about Absalom's everlasting state; but he rather seems to have spoken without due thought. He is to be blamed for showing so great fondness for a graceless son. Also for quarrelling with Divine justice. And for opposing the justice of the nation, which, as king, he had to administer, and which ought to be preferred before natural affection. The best men are not always in a good frame; we are apt to over-grieve for what we over-loved. But while we learn from this example to watch and pray against sinful indulgence, or neglect of our children, may we not, in David, perceive a shadow of the Saviour's love, who wept over, prayed for, and even suffered death for mankind, though vile rebels and enemies.