2 Samuel 17:22-24

22Then David arose, and all the people who were with him, and they crossed over the Jordan. By morning light, not even one of them was left who had not crossed the Jordan.

23Now when Ahithophel saw that his counsel was not followed, he saddled his donkey, arose, went to his home in his hometown set his house in order, and hanged himself. So he died and was buried in his father’s tomb.

24David had reached Mahanaim by the time Absalom crossed the Jordan, he and all the men of Israel with him.