(21) And Ahithophel said.--The counsel of Ahithophel was in effect that Absalom should make the breach between him and his father absolute and irreconcilable. His followers would thus be assured of the impossibility of his securing a pardon for himself while they were left to their fate. After adopting this course, he must necessarily persist to the end. The taking of the harem of his predecessor by the incoming monarch was an Oriental custom, to the enormity of which the mind was blunted by the practice of polygamy.

Verse 21. - Ahithophel said. Ahithophel's counsel was utterly abominable, even though the deed would not be regarded by any of the Israelites as incestuous. A king inherited his predecessor's harem, and Absalom's act was a coarse and rude assertion that David's rights were at an end, and that crown and lands and property, even to his wives, now all belonged to the usurper. But, while polygamy had thus degraded the wives and concubines into mere chattels, the harem was the property most jealously guarded by its owner (2 Samuel 3:7; 1 Kings 2:22); and Absalom's act was an outrage which David could never have pardoned. And this was what Ahithophel wanted. He was afraid that if Absalom's cause began to decline, he might come to terms with his father, who would readily forgive a son if he submitted, but would certainly punish Ahithophel. For his own selfish purposes, therefore, he led Absalom on to a crime which rendered a reconciliation with David impossible, and pledged all the conspirators to carry out the matter to the bitter end; and that end could only be the death of David if the conspiracy succeeded. But this bitterness to David would vex all moderate men, and weaken Absalom's cause. It was of advantage only to such as were deeply committed to the rebellion, and bent on killing David. To him it was terrible sorrow; for he knew that this open shame was the punishment of his own secret infamy (2 Samuel 12:11, 12); and in it, again, he saw the meshes of the avenger's net tightening around him.

16:15-23 The wisest counsellors of that age were Ahithophel and Hushai: Absalom thinks himself sure of success, when he has both; on them he relies, and consults not the ark, though he had that with him. But miserable counsellors were they both. Hushai would never counsel him to do wisely. Ahithophel counselled him to do wickedly; and so did as effectually betray him, as he did, who was designedly false to him: for they that advise men to sin, certainly advise them to their hurt. After all, honesty is the best policy, and will be found so in the long run. Ahithophel gave wicked counsel to Absalom; to render himself so hateful to his father, that he would never be reconciled to him; this cursed policy was of the devil. How desperately wicked is the human heart!And Ahithophel said unto Absalom,.... Either immediately of himself, without consulting with others; or after a consultation had been held between them, he as the president of it, and their mouth, gave the following advice; though the former seems most correct:

go in unto thy father's concubines, which he hath left, to keep the house; and lie with them; there were ten of them, 2 Samuel 15:16,

and all Israel shall hear that thou art abhorred of thy father; this fact will be so abominable to him, and he will so highly resent it, as never to forgive thee, and be reconciled unto thee:

then shall the hands of all that are with thee be strong; he intimates that they were now weak, and did not act with spirit; they were fearful that David and Absalom would be reconciled, and then they should be reckoned traitors, and fall a sacrifice to David's vengeance, for their treason against him: but by Absalom's taking such a step as this, which would make him for ever the object of his father's hatred, their hands and hearts would be strengthened, and their fears removed, and they would not have the least jealousy of a reconciliation between them, and of their being left to the resentment of David. Some think this was not his only reason for giving this counsel, but also to revenge David's abuse of Bathsheba, his son's daughter, as she is supposed to be; see Gill on 2 Samuel 15:12; however, it was so ordered in Providence, that this advice should be given and taken, to fulfil the prophecy of the Lord to Nathan, 2 Samuel 12:11.