2 Samuel 15:10-13

10Then Absalom sent spies throughout the tribes of Israel with this message: “When you hear the sound of the horn, you are to say, ‘Absalom reigns in Hebron!’”

11Two hundred men from Jerusalem accompanied Absalom. They had been invited as guests and they went along innocently, for they knew nothing about the matter. 12While Absalom was offering the sacrifices, he sent for Ahithophel the Gilonite, David’s counselor, to come from his hometown of Giloh.

So the conspiracy gained strength, and Absalom’s following kept increasing.

13Then a messenger came to David and reported, “The hearts of the men of Israel are with Absalom.”