II Samuel 15:27, 35

The king also said to Zadok the priest, “Are you not a seer? Return to the city in peace, and your two sons with you, Ahimaaz your son, and Jonathan the son of Abiathar.

And 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.