Matthew Henry on 2 Samuel 16:15–end
Absalom had notice sent him speedily by some of his friends at Jerusalem that David had withdrawn, and with what a small retinue he had gone; so that the coasts were clear, Absalom might take possession of Jerusalem when he pleased. The gates were open, and there was none to oppose him. Accordingly he came without delay (Sa2 16:15), extremely elevated, no doubt, with this success at first, and that that in which, when he formed his design, he probably apprehended the greatest difficulty, was so easily and effectually done. Now that he is master of Jerusalem he concludes all his own, the country will follow of course. God suffers wicked men to prosper awhile in their wicked plots, even beyond…
Read the whole note in the consoleJamieson-Fausset-Brown on 2 Samuel 16:20
AHITHOPHEL'S COUNSEL. (Sa2 16:20-23)
Give counsel among you what we shall do--This is the first cabinet council on record, although the deference paid to Ahithophel gave him the entire direction of the proceedings.
Adam Clarke on 2 Samuel 16:18
Whom the Lord and this people - choose - Here is an equivocation; Hushai meant in his heart that God and all the people of Israel had chosen David; but he spake so as to make Absalom believe that he spoke of him: for whatever of insincerity may appear in this, Hushai is alone answerable. What he says afterwards may be understood in the same way.
John Gill on 2 Samuel 16:20
Then said Absalom to Ahithophel,.... Having two such able counsellors as he and Hushai, he directs his speech to Ahithophel, as being his first and chief counsellor:
give counsel among you what we shall do; he orders them to form a counsel, consult among themselves what was proper to be now done at Jerusalem, whether it was right to stay here or pursue after David and his men. Absalom did not send to the high priest to ask counsel of God, by Urim and Thummim before the ark, but wholly confided in his privy council.