2 Samuel 15:12

12And Absalom sent for 15:12 Ahithophel, one of David’s wisest and most trusted advisers, was the father of Eliam, Bathsheba’s father. Ahithophel’s alliance with Absalom may have been an act of revenge motivated by David’s sin against his granddaughter and her murdered husband.Ahithophel the Gilonite, David’s counselor, from his city Giloh, while he was offering sacrifices. And the conspiracy grew strong, for the people with Absalom increased continually.