2 Samuel 15:32-34

32When David came to the summit, where he used to worship God, Hushai the Archite was there to meet him with his robe torn and dust on his head.

33David said to him, “If you go on with me, you will be a burden to me. 34But you can thwart the counsel of Ahithophel for me if you return to the city and say to Absalom: ‘I will be your servant, my king; in the past I was your father’s servant, but now I will be your servant.’