Ezekiel 44:11, 15

These Levites are to be servants in my Holy Place. They may guard the gates of the Temple and serve in the Temple area. They may kill the animals for the burnt offering and the sacrifices for the people. They may stand before the people to serve them.

“ ‘But the priests who are Levites and descendants of Zadok took care of my Holy Place when Israel left me, so they may come near to serve me. They may stand in my presence to offer me the fat and blood of the animals they sacrifice, says the Lord GOD.