2 Samuel 15:30-31

30So David went up by the Ascent of the Mount of Olives, and wept as he went up; and he had his head covered and went barefoot. And all the people who were with him covered their heads and went up, weeping as they went up.

31Then someone told David, saying, “Ahithophel is among the conspirators with Absalom.” And David said, “O Lord, I pray, turn the counsel of Ahithophel into foolishness!”