Shmuel Bais 15:35

35 And hast thou not there with thee Tzadok and Evyatar (Abiathar) the kohanim? Therefore it shall be, that what thing soever thou shalt hear out of the Bais HaMelech, thou shalt tell it to Tzadok and Evyatar (Abiathar) the kohanim.

Shmuel Bais 15:35 Meaning and Commentary

2 Samuel 15:35

And [hast thou] not there with thee Zadok and Abiathar the
priests?
&c.] To assist in forming schemes directly opposite to Ahithophel's, or to whom he could communicate the secrets of Absalom's court:

therefore it shall be [that] what thing soever thou shalt hear out of
the king's house;
Absalom's, who had now, at possession of the house and palace of David:

thou shalt tell [it] to Zadok and Abiathar the priests;
to whom he might have recourse without suspicion, pretending he had business with them as priests, on religious accounts, to offer sacrifices for him, &c.

Shmuel Bais 15:35 In-Context

33 Unto whom Dovid said, If thou passest on with me, then thou shalt be a massa (burden) unto me;

34 But if thou return to the Ir, and say unto Avshalom, I will be thy eved, O melech; as I have been eved avicha hitherto, so will I now also be thy eved; then mayest thou for me bring to nought the etza (counsel) of Achitophel.

35 And hast thou not there with thee Tzadok and Evyatar (Abiathar) the kohanim? Therefore it shall be, that what thing soever thou shalt hear out of the Bais HaMelech, thou shalt tell it to Tzadok and Evyatar (Abiathar) the kohanim.

36 Hinei, they have there with them their two banim, Achima’atz son of Tzadok, and Yonatan of Evyatar; by them ye shall send unto me everything that ye can hear.

37 So Chushai the re’eh Dovid came into the Ir, and Avshalom came into Yerushalayim.