The following came up from the towns of Tel Melah, Tel Harsha, Kerub, Addon and Immer, but they could not show that their families were descended from Israel:
the descendants of
And from among the priests:
These searched for their family records, but they could not find them and so were excluded from the priesthood as unclean.
The governor, therefore, ordered them not to eat any of the most sacred food until there should be a priest ministering with the Urim and Thummim.
References for Nehemiah 7:65