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.
2 Samuel 15:12
Surrounding context
15:11 And with Absalom went two hundred men invited from Jerusalem, and they went along innocently and did not know anything.
15:12 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.
15:13 Now a messenger came to David, saying, "The hearts of the men of Israel are with Absalom."