2 Samuel 15:12, 31

While Absalom was offering sacrifices, he sent for Ahithophel, one of the people who advised David, to come from his hometown of Giloh. So Absalom’s plans were working very well. More and more people began to support him.

Someone told David, “Ahithophel is one of the people with Absalom who made secret plans against you.” So David prayed, “LORD, please make Ahithophel’s advice foolish.”