2 Samuel 16:22 WEB

²⁰  Then said Absalom to Ahithophel, Give your counsel what we shall do.

²¹  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  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  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.