2 Samuel 15:33-37

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

34But if you return to the city, and say to Absalom, ‘I will be your servant, O king; as I was your father’s servant previously, so I will now also be your servant,’ then you may defeat the counsel of Ahithophel for me.

35And do you not have Zadok and Abiathar the priests with you there? Therefore it will be that whatever you hear from the king’s house, you shall tell to Zadok and Abiathar the priests.

36Indeed they have there with them their two sons, Ahimaaz, Zadok’s son, and Jonathan, Abiathar’s son; and by them you shall send me everything you hear.”

37So Hushai, David’s friend, went into the city. And Absalom came into Jerusalem.