31 And one told David, saying, Ahithophel is among the conspirators with Absalom. And David said, O Jehovah, I pray thee, turn the counsel of Ahithophel into foolishness. 32 And it came to pass, that, when David was come to the top [of the ascent], where God was worshipped, behold, Hushai the Archite came to meet him with his coat rent, and earth upon his head. 33 And David said unto him, If thou passest on with me, then thou wilt be a burden unto me: 34 but if thou return to the city, and say unto Absalom, I will be thy servant, O king; as I have been thy father's servant in time past, so will I now be thy servant; then wilt thou defeat for me the counsel of Ahithophel. 35 And hast thou not there with thee Zadok and Abiathar the priests? therefore it shall be, that what thing soever thou shalt hear out of the king's house, thou shalt tell it to Zadok and Abiathar the priests. 36 Behold, they have there with them their two sons, Ahimaaz, Zadok's son, and Jonathan, Abiathar's son; and by them ye shall send unto me everything that ye shall hear. 37 So Hushai, David's friend, came into the city; and Absalom came into Jerusalem.
Matthew Henry's Commentary on 2 Samuel 15:31-37
Commentary on 2 Samuel 15:31-37
(Read 2 Samuel 15:31-37)
David prays not against Ahithophel's person, but against his counsel. He prayed this, in firm belief that God has all hearts in his hand, and tongues also. But we must second our prayers with endeavours, and David did so, else we tempt God. But we do not find wisdom and simplicity so united in any mere man, that we can perceive nothing which needs forgiveness. Yet, when the Son of David was treated with all possible treachery and cruelty, his wisdom, meekness, candour, and patience, were perfect. Him let us follow, cleave to, and serve, in life and in death.