The Levites— The whole passage, from Ezekiel 44:10 to Ezekiel 44:16., seems most naturally to refer to the period of time when the second temple was rebuilt.
Related Commentaries of Ezekiel 44:15
Ezekiel 44:15
15 But the priests the Levites, the sons of Zadok, that kept the charge of my sanctuary when the children of Israel went astray from me, they shall come near to me to minister unto me, and they shall stand before me to offer unto me the fat and the blood, saith the Lord GOD: