Ezra 2:61-63

Of the sons of the priests: the sons of Hobaiah, of Hakkoz, and of Barzillai, who took a wife from the daughters of Barzillai the Gileadite, and he was known by their name. [2 Sam 17:27, 28; 19:31-39] These searched [for their names] among those registered in the genealogies, but they were not found; so they were excluded from the priesthood as [ceremonially] unclean. The governor told them that they should not eat of the most holy things [the priests’ food] until a priest stood up with Urim and Thummim [who by consulting these articles in his breastplate could determine God’s will in the matter].