2 Samuel 15:32-34

32It happened when David came to the summit [of the Mount of Olives], where he worshiped God, behold, Hushai the Archite came to meet him with his tunic torn and dust on his head [as if in mourning].

33David said to him, “If you go on with me, you will be a burden to me.

34But if you return to the city, and say to Absalom, ‘I will be your servant, O king; as I have been your father’s servant in the past, so I will be your servant now;’ then you can thwart (make useless) the advice of Ahithophel for me.