2 Kings 23:9

Came not up. The priests who had been serving at the idolatrous shrines and who had been summoned to Jerusalem were not permitted to officiate in the sacred responsibilities of the Temple service. In Ezekiel’s description of the restored state the Levitical priests who had gone astray were henceforth not permitted to participate in the holy services of the Temple, although they were permitted to perform certain of the more menial services (Eze. 44:10-14).

Of the unleavened bread. Although not permitted to participate in the sacred services of the Temple, these priests were not cut off from all support. They were treated much the same as those priests who were found to have blemishes on their persons (see Lev. 21:17-23).