2 Samuel 17:21-23

New International Version

²¹ After they had gone, the two climbed out of the well and went to inform King David. They said to him, “Set out and cross the river at once; Ahithophel has advised such and such against you.” ²² So David and all the people with him set out and crossed the Jordan. By daybreak, no one was left who had not crossed the Jordan.

²³ When Ahithophel saw that his advice^(A) had not been followed, he saddled his donkey and set out for his house in his hometown. He put his house in order^(B) and then hanged himself. So he died and was buried in his father’s tomb.