Hushai replied, "This time the advice of Ahithophel is not sound."

2 Samuel 16:21
Ahithophel replied, "Sleep with your father's concubines, whom he has left to keep the palace. When all Israel hears that you have become a stench to your father, then the hands of all who are with you will be strengthened."

2 Samuel 17:6
So Hushai came to Absalom, who told him, "Ahithophel has spoken this proposal. Should we carry it out? If not, what do you say?"

And Hushai said to Absalom, The counsel that Ahithophel has given is not good at this time.