2 Samuel 15:32-37

While David was coming to the summit, where God was worshiped, behold, Hushai the Archite came to meet him with his coat torn and dirt on his head. David said to him, “If you go on with me, you will be a burden to me. But 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 time past, so now I will be your servant,’ then you will defeat for me the counsel of Ahithophel. Are not Zadok and Abiathar the priests with you there? So whatever you hear from the king’s house, tell it to Zadok and Abiathar the priests. Behold, their two sons are with them there, Ahimaaz, Zadok’s son, and Jonathan, Abiathar’s son, and by them you shall send to me everything you hear.” So Hushai, David’s friend, came into the city, just as Absalom was entering Jerusalem.