II Samuel 15:10-12

Then Absalom sent spies throughout all the tribes of Israel, saying, “As soon as you hear the sound of the trumpet, then you shall say, ‘Absalom reigns in Hebron!’ ” And with Absalom went two hundred men invited from Jerusalem, and they went along innocently and did not know anything. Then Absalom sent for Ahithophel the Gilonite, David’s counselor, from his city—from Giloh—while he offered sacrifices. And the conspiracy grew strong, for the people with Absalom continually increased in number.