(31) One told David.--This is no doubt the meaning, but the preposition has dropped out of the Hebrew text, leaving it unintelligible, and reading literally, and David told.

Verse 31. - And one told David. The Hebrew literally is, and David told. But we cannot suppose that David had previously known of Ahithophel's defection. The text is evidently corrupt, and the Authorized Version gives the right sense. On hearing of the defection of a man so famous for practical sound judgment, David prays to God to frustrate his counsel, and the opportunity for devising means for this end quickly follows.

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.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 2 Samuel 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, 2 Samuel 17:14.