What does Ezekiel 44:15 mean?

But the priests from the family of Zadok, who stayed faithful to me when Israel went astray, will come near to serve me. They'll stand before me, offer me fat and blood. That's what the Lord God says. Ezekiel 44:15 - Modern Text Bible

(The Zadokite priests, who remained loyal, are given the honor of serving directly before God.)