Nehemiah 7:63-64

63Also, of the priests: the sons of Hobaiah, the sons of Hakkoz, the sons of Barzillai (who had taken a wife of the daughters of Barzillai the Gileadite and was called by their name). 64These sought their registration among those enrolled in the genealogies, but it was not found there, so they were excluded from the priesthood as unclean.
Copyright information for ESV