Ezekiel 44:11, 15

They may still be Temple guards and gatekeepers, and they may slaughter the animals brought for burnt offerings and be present to help the people.

“However, the Levitical priests of the family of Zadok continued to minister faithfully in the Temple when Israel abandoned me for idols. These men will serve as my ministers. They will stand in my presence and offer the fat and blood of the sacrifices, says the Sovereign LORD.