2 Samuel 16
20 Ref Then said Absalom to Ahithophel, Give counsel among you what we shall do.
21 Ref And Ahithophel said unto Absalom, Go in unto thy father's concubines, which he hath left to keep the house; and all Israel shall hear that thou art abhorred of thy father: then shall the hands of all that are with thee be strong.
22 Ref So they spread Absalom a tent upon the top of the house; and Absalom went in unto his father's concubines in the sight of all Israel.
23 Ref And the counsel of Ahithophel, which he counseled in those days, was as if a man had inquired at the oracle of God: so was all the counsel of Ahithophel both with David and with Absalom.