Now when Ahithophel saw that his advice was not followed, he saddled a donkey, and arose and went home to his house, to his city. Then he put his household in order, and hanged himself, and died; and he was buried in his father's tomb.
2 Samuel 17:23
Surrounding context
17:22 So David and all the people who were with him arose and crossed over the Jordan. By morning light not one of them was left who had not gone over the Jordan.
17:23 Now when Ahithophel saw that his advice was not followed, he saddled a donkey, and arose and went home to his house, to his city. Then he put his household in order, and hanged himself, and died; and he was buried in his father's tomb.
17:24 Then David went to Mahanaim. And Absalom crossed over the Jordan, he and all the men of Israel with him.