Ezra 2:61-63

And from among the priests: The descendants of Hobaiah, Hakkoz and Barzillai (a man who had married a daughter of Barzillai the Gileadite and was called by that name). These searched for their family records, but they could not find them and so were excluded from the priesthood as unclean. The governor ordered them not to eat any of the most sacred food until there was a priest ministering with the Urim and Thummim.