Second Samuel 17:21-23

²¹It came about after they had left that Jonathan and Ahimaaz came up out of the well. They went to report to King David; they said to him, “Get up and cross quickly over the water because Ahithophel has given such and such advice about you.”

²²Then David arose and all the people who were with him, and they crossed over the Jordan. By morning daylight not one of them had failed to cross over the Jordan.

²³When Ahithophel saw that his advice had not been followed, he saddled his donkey and left. He went home to his own city, set his affairs in order, and hanged himself. In this way he died and was buried in the tomb of his father.