15 Then Hushai told the priests Zadok and Abiathar, "Ahithophel advised Absalom and the elders of Israel thus and thus, and I advised them thus and thus. 16 Now send this message as quickly as possible to David: 'Don't spend the night on this side of the river; cross immediately or the king and everyone with him will be swallowed up alive.'" 17 Jonathan and Ahimaaz were waiting around at En Rogel. A servant girl would come and give them messages and then they would go and tell King David, for it wasn't safe to be seen coming into the city. 18 But a soldier spotted them and told Absalom, so the two of them got out of there fast and went to a man's house in Bahurim. He had a well in his yard and they climbed into it. 19 The wife took a rug and covered the well, then spread grain on it so no one would notice anything out of the ordinary. 20 Shortly, Absalom's servants came to the woman's house and asked her, "Have you seen Ahimaaz and Jonathan?" The woman said, "They were headed toward the river." They looked but didn't find them, and then went back to Jerusalem. 21 When the coast was clear, Ahimaaz and Jonathan climbed out of the well and went on to make their report to King David, "Get up and cross the river quickly; Ahithophel has given counsel against you!"
22 David and his whole army were soon up and moving and crossed the Jordan. As morning broke there was not a single person who had not made it across the Jordan.
Matthew Henry's Commentary on 2 Samuel 17:15-22
Commentary on 2 Samuel 17:1-21
(Read 2 Samuel 17:1-21)
Here was a wonderful effect of Divine Providence blinding Absalom's mind and influencing his heart, that he could not rest in Ahithophel's counsel, and that he should desire Hushai's advice. But there is no contending with that God who can arm a man against himself, and destroy him by his own mistakes and passions. Ahithophel's former counsel was followed, for God intended to correct David; but his latter counsel was not followed, for God meant not to destroy him. He can overrule all counsels. Whatever wisdom or help any man employs or affords, the success is from God alone, who will not let his people perish.
Commentary on 2 Samuel 17:22-29
(Read 2 Samuel 17:22-29)
Ahithophel hanged himself for vexation that his counsel was not followed. That will break a proud man's heart which will not break a humble man's sleep. He thought himself in danger, concluding, that, because his counsel was not followed, Absalom's cause would fail; and to prevent a possible public execution, he does justice upon himself. Thus the breath is stopped, and the head laid low, from which nothing could be expected but mischief. Absalom chased his father. But observe how God sometimes makes up to his people that comfort from strangers, which they are disappointed of in their own families. Our King needs not our help; but he assures us, that what we do for the least of his brethren, who are sick, poor, and destitute, shall be accepted and recompensed as if done to himself