2 Samuel 15:32-37

32When David reached the summit, where he used to worship God, Hushai the Arkite met him with his clothes torn and dirt on his head.

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

34But 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.’

35Zadok 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.

36Furthermore, their two sons are there with them, Zadok’s son Ahimaaz and Abiathar’s son Jonathan. You must send them to me with any information you hear.”

37So David’s friend Hushai arrived in the city, just as Absalom was entering Jerusalem.