2 Samuel 15:32-35

15:32 When David reached the summit, where he used to worship God, Hushai the Arkite met him with his clothes torn and dirt on his head. 15:33 David said to him, “If you leave with me you will be a burden to me. 15:34 But you will be able to counter the advice of Ahithophel if you go back to the city and say to Absalom, ‘I will be your servant, O king! Previously I was your father’s servant, and now I will be your servant.’ 15:35 Zadok and Abiathar the priests will be there with you. Everything you hear in the king’s palace you must tell Zadok and Abiathar the priests.