One told David, or, David told, i.e. David being hereof informed, acquaints his friends and followers with it, to stir them up to join with him in the following prayer against him. Turn the counsel of Ahithophel into foolishness; either infatuate him, that he may give foolish counsel; or let his counsel be rejected as foolish, or spoiled by the foolish execution of it.
Related Commentaries of 2 Samuel 15:31
2 Samuel 15:31
31 And one told David, saying, Ahithophel is among the conspirators with Absalom. And David said, O LORD, I pray thee, turn the counsel of Ahithophel into foolishness.