2 Samuel 15:10-12

But Absalom sent secret messengers throughout all the tribes of Israel, saying, “As soon as you hear the sound of the trumpet, then say, ‘Absalom is king at Hebron!’” With Absalom went two hundred men from Jerusalem who were invited guests, and they went in their innocence and knew nothing. And while Absalom was offering the sacrifices, he sent for Ahithophel the Gilonite, David’s counselor, from his city Giloh. And the conspiracy grew strong, and the people with Absalom kept increasing.