וְנָתַתָּ֣ה אֶל־הַכֹּהֲנִ֣ים הַלְוִיִּ֡ם אֲשֶׁ֣ר הֵם֩ מִזֶּ֨רַע צָד֜וֹק הַקְּרֹבִ֣ים אֵלַ֗י נְאֻ֛ם אֲדֹנָ֥י יְהוִ֖ה לְשָֽׁרְתֵ֑נִי פַּ֥ר בֶּן־בָּקָ֖ר לְחַטָּֽאת׃
你要將一頭公牛犢交給利未人祭司，就是撒督的後裔，他們親近我，事奉我，用作贖罪祭。這是主永恆者說的。
Tze'enah Ure'enah
“You shall give” [43:19]. You should give the priests the Levites who are from the “seed of Zadok” who was a High Priest in the first Temple. These same children should offer me an ox as a sin offering in the latter Temple.
Rashi
who are of the seed of Zadok Since he was the High Priest who was the first to serve in the Temple, in the days of Solomon, they are [all] called by his name.