2 Samuel 15:32-34

32When David reached the summit of the Mount of Olives where people worshiped God, Hushai the Arkite was waiting there for him. Hushai had torn his clothing and put dirt on his head as a sign of mourning.

33But David told him, “If you go with me, you will only be a burden.

34Return to Jerusalem and tell Absalom, ‘I will now be your adviser, O king, just as I was your father’s adviser in the past.’ Then you can frustrate and counter Ahithophel’s advice.