John Gill Commentary Ezekiel 43:19

"Thou shalt give to the priests the Levites that are of the seed of Zadok, who are near unto me, to minister unto me, saith the Lord Jehovah, a young bullock for a sin-offering." — Ezekiel 43:19 (ASV)

And you shall give to the priests the Levites, who are of the
seed of Zadok
Who, in Solomon's time, was put in the room of Abiathar; see (Ezekiel 40:46) , his name signifies a "righteous" one, a type he was of Jesus Christ the righteous; and here his seed signify the seed of Christ, such whom he makes priests unto the Lord; to these, in a visionary way, the prophet was to give this altar, for them to serve at, and eat of; and all the rites and ordinances to observe and keep; and the sacrifices to offer on it, after mentioned:

which approach unto me, to minister unto me, says the Lord God ;
(See Gill on Ezekiel 40:46):

a young bullock for a sin offering :
typical of Christ, strong and laborious, able to bear the sins of his people; to become a sin offering, and to be made sin itself for them.