2 Kings 23:9

Nevertheless the priests of the high places came not up to the altar of the Lord in Jerusalem, but they did eat of the unleavened bread among their brethren.

Cross-references

Ezekiel 44:10-14 restricts unfaithful Levites from priestly service but allows lesser duties, paralleling the restriction to eating bread without altar service.

Ezekiel 44:13 explicitly forbids unfaithful Levites from priestly service, directly echoing the restriction on altar service here.

1 Samuel 2:36 prophesies priests begging for bread; here priests are given bread but no service—parallel of reduced priestly status.