2 Samuel 17:21-23

²¹And when they were gone, they came up out of the well, and going on told king David, and said: Arise, and pass quickly over the river: for this manner of counsel has Achitophel given against you.

²²So David arose, and all the people that were with him, and they passed over the Jordan, until it grew light, and not one of them was left that was not gone over the river.

²³But Achitophel seeing that his counsel was not followed, saddled his ass, and arose and went home to his house and to his city, and putting his house in order, hanged himself, and was buried in the sepulchre of his father.