2. Samuel 15:31

Turn the counsel of Ahithophel into foolishness - Ahithophel was a wise man, and well versed in state affairs; and God alone could confound his devices.

David said, Turn, O Lord, . . . the counsel of Ahithophel--this senator being the mainstay of the conspiracy.

And one told David,.... That came either from Hebron or from Jerusalem: Ahithophel is among the conspirators with Absalom; Absalom sent for him, and it seems he came to him, and continued with him, see Sa2 15:12, and David said, O Lord, I pray thee, turn the counsel of Ahithophel into foolishness; either suffer him to give foolish counsel, or confound the schemes projected by him, and let them not be carried into execution; for God can, and sometimes does, disappoint crafty counsellors, that they cannot perform what they devise, but they are taken in their own craftiness, and their counsel is carried headlong, Job 5:12; this prayer was answered, Sa2 17:14.

Absalom's Rebellion and David's Flight - 2 Samuel 15-16:14 After this restoration to favour, Absalom soon began to aspire to the throne, setting up a princely court, and endeavouring to turn the hearts of the people towards himself, by addressing in a friendly manner any who came to seek redress from the king in matters in dispute, and by saying things adapted to throw suspicion upon his father's rule (Sa2 15:1-6). When he had succeeded in this, he asked permission from the king to take a journey to Hebron, under the pretence of wanting to fulfil a vow which he had made during his banishment; and when once there, he soon proceeded with his rebellious intentions (Sa2 15:7-12). As soon as David heard of it, he determined to fly from Jerusalem, and crossed the Kidron with his faithful adherents. Having sent the priests with the ark of the covenant back to the city, he went up to the Mount of Olives, amidst the loud lamentations of the people. Hushai, who came to meet him, he sent to the city, to frustrate the counsel of Ahithophel, who was one of the conspirators, and to send information to him of what was going forward (vv. 13-37). When he reached the top, Ziba, Mephibosheth's servant, came to meet him with provisions and succour (Sa2 16:1-4) whilst Shimei, a relation of the house of Saul, followed him with curses and stones (Sa2 16:5-14). With this rebellion the calamities which Nathan had predicted to David on account of his sin with Bathsheba began to burst upon him in all their fulness. The success of the rebellion itself may be accounted for, from the fact that the consciousness of his own fault not only made David weak towards his sons, but produced a want of firmness in his resolutions; whilst the imperfections and defects in the internal administration of the king…

Nothing, it seems, appeared to David more threatening in Absalom's plot than that Ahithophel was in it; for one good head, in such a design, is worth a thousand good hands. Absalom was himself no politician, but he had got one entirely in his interest that was, and would be the more dangerous because he had been all along acquainted with David's counsels and affairs; if therefore he can be baffled, Absalom is as good as routed and the head of the conspiracy cut off. This David endeavours to do. I. By prayer. When he heard that Ahithophel was in the plot he lifted up his heart to God in this short prayer: Lord, turn the counsel of Ahithophel into foolishness, Sa2 15:31. He had not opportunity for a long prayer, but he was not one of those that thought he should be heard for his much speaking. It was a fervent prayer: "Lord, I pray thee, do this." God is well pleased with the importunity of those that come to him with their petitions. David is particular in this prayer; he names the person whose counsels he prays against. God gives us leave, in prayer, to be humbly and reverently free with him, and to mention the particular care, and fear, and grief, that lies heavily upon us. David prayed not against Ahithophel's person, but against his counsel, that God would turn it into foolishness, that, though he was a wise man, he might at this time give foolish counsel, or, if he gave wise counsel, that it might be rejected as foolish, or, if it were followed, that by some providence or other it might be defeated, and not attain the end. David prayed this in a firm belief that God has all hearts in his hand, and tongues too, that, when he pleases, he can take away the understanding of the aged and make the judges fools, (Job 12:17; Isa 3:2, Isa 3:3), and in hope that God would own…

15:31 let Ahithophel give . . . foolish advice: David also sent a double-agent, Hushai, to confound Ahithophel’s advice (15:32-37; 17:1-14).