And the counsel of Ahithophel, which he counseled in those days, was as if a man had inquired at the oracle of God: so was all the counsel of Ahithophel both with David and with Absalom.
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George Leo Haydock
Absalom. It tended to promote the end which was desired, (Haydock) whether good or bad. His prudence is hyperbolically compared with the divine oracles; (Menochius) and his authority must have had great weight, since David began to take precautions, only after he had heard that Achitophel had joined the rebels; and Absalom was persuaded (Calmet) to perpetrate so foul and unnatural a crime publicly, no one daring to make any opposition. Chusai was silent; as he was aware that, if he began to contradict this counsellor at first, he would only incur suspicion. (Haydock)
The unjust commonly endeavour by all means to attach people to themselves: but God, in the end, turns their counsels against themselves. (Worthington)