2 Samuel 17:22-24

22So David and all the people with him went across the Jordan River during the night, and they were all on the other bank before dawn.

23When Ahithophel realized that his advice had not been followed, he saddled his donkey, went to his hometown, set his affairs in order, and hanged himself. He died there and was buried in the family tomb.

24David soon arrived at Mahanaim. By now, Absalom had mobilized the entire army of Israel and was leading his troops across the Jordan River.