New King James Version (NKJV)
2 Samuel 16
20 Then Absalom said to Ahithophel, "Give counsel as to what we should do."
21 And Ahithophel said to Absalom, "Go in to your father’s concubines, whom he has left to keep the house; and all Israel will hear that you are abhorred by your father. Then the hands of all who are with you will be strong."
22 So they pitched a tent for Absalom on the top of the house, and Absalom went in to his father’s concubines in the sight of all Israel.
23 Now the advice of Ahithophel, which he gave in those days, was as if one had inquired at the oracle of God. So was all the advice of Ahithophel both with David and with Absalom.
2 Samuel 17
1 Moreover Ahithophel said to Absalom, "Now let me choose twelve thousand men, and I will arise and pursue David tonight.
2 I will come upon him while he is weary and weak, and make him afraid. And all the people who are with him will flee, and I will strike only the king.
3 Then I will bring back all the people to you. When all return except the man whom you seek, all the people will be at peace."
4 And the saying pleased Absalom and all the elders of Israel.
5 Then Absalom said, "Now call Hushai the Archite also, and let us hear what he says too."
6 And when Hushai came to Absalom, Absalom spoke to him, saying, "Ahithophel has spoken in this manner. Shall we do as he says? If not, speak up."
7 So Hushai said to Absalom: "The advice that Ahithophel has given is not good at this time.