2 Samuel 16:20

Then said Absalom to Ahithophel
Having two such able counsellors as he and Hushai, he directs his speech to Ahithophel, as being his first and chief counsellor:

give counsel among you what we shall do;
he orders them to form a counsel, consult among themselves what was proper to be now done at Jerusalem, whether it was right to stay here or pursue after David and his men. Absalom did not send to the high priest to ask counsel of God, by Urim and Thummim before the ark, but wholly confided in his privy council.