2 Samuel 16
20 Ref Then said Absalom to Ahithophel, Give your counsel what we shall do.
21 Ref Ahithophel said to Absalom, Go in to your father's concubines, that he has left to keep the house; and all Israel will hear that you are abhorred of your father: then will the hands of all who are with you be strong.
22 Ref So they spread Absalom a tent on the top of the house; and Absalom went in to his father's concubines in the sight of all Israel.
23 Ref The counsel of Ahithophel, which he gave in those days, was as if a man inquired at the oracle of God: so was all the counsel of Ahithophel both with David and with Absalom.