2 Samuel 15:30-31

30Then David continued to go up the ascent of the Mount of Olives, weeping as he ascended. He had his head covered and was walking barefoot. So all the people with him each covered his head as they went up, weeping as they ascended.

31Then someone told David saying, “Ahithophel is among the conspirators with Absalom.” So David prayed, “Adonai, please turn the counsel of Ahithophel into foolishness.”