Ezekiel 44:11, 15

They shall be ministers in my sanctuary, having oversight at the gates of the temple and ministering in the temple. They shall slaughter the burnt offering and the sacrifice for the people, and they shall stand before the people, to minister to them.

“But the Levitical priests, the sons of Zadok, who kept the charge of my sanctuary when the people of Israel went astray from me, shall come near to me to minister to me. And they shall stand before me to offer me the fat and the blood, declares the Lord GOD.