Yehezkiel 40:46

40:46 and the chamber which faces north is for the priests who keep charge of the altar. These are the descendants of Zadok, from the descendants of Levi, who may approach the Lord to minister to him.”

Yehezkiel 43:19

43:19 you will give a young bull for a sin offering to the Levitical priests who are descended from Zadok, who approach me to minister to me, declares the sovereign Lord.