Now Absalom and all the Israelites came to Jerusalem; Ahithophel was with him. When Hushai the Archite, David's friend, came to Absalom, Hushai said to Absalom, "Long live the king! Long live the king!" Absalom said to Hushai, "Is this your loyalty to your friend? Why did you not go with your friend?" Hushai said to Absalom, "No; but the one whom the Lord and this people and all the Israelites have chosen, his I will be, and with him I will remain. Moreover, whom should I serve? Should it not be his son? Just as I have served your father, so I will serve you."
Then Absalom said to Ahithophel, "Give us your counsel; what shall we do?" Ahithophel said to Absalom, "Go in to your father's concubines, the ones he has left to look after the house; and all Israel will hear that you have made yourself odious to your father, and the hands of all who are with you will be strengthened." So they pitched a tent for Absalom upon the roof; and Absalom went in to his father's concubines in the sight of all Israel. Now in those days the counsel that Ahithophel gave was as if one consulted the oracle of God; so all the counsel of Ahithophel was esteemed, both by David and by Absalom.
Moreover Ahithophel said to Absalom, "Let me choose twelve thousand men, and I will set out and pursue David tonight. I will come upon him while he is weary and discouraged, and throw him into a panic; and all the people who are with him will flee. I will strike down only the king, and I will bring all the people back to you as a bride comes home to her husband. You seek the life of only one man, and all the people will be at peace." The advice pleased Absalom and all the elders of Israel.