וְהַכֹּהֲנִ֨ים הַלְוִיִּ֜ם בְּנֵ֣י צָד֗וֹק אֲשֶׁ֨ר שָׁמְר֜וּ אֶת־מִשְׁמֶ֤רֶת מִקְדָּשִׁי֙ בִּתְע֤וֹת בְּנֵֽי־יִשְׂרָאֵל֙ מֵֽעָלַ֔י הֵ֛מָּה יִקְרְב֥וּ אֵלַ֖י לְשָֽׁרְתֵ֑נִי וְעָמְד֣וּ לְפָנַ֗י לְהַקְרִ֥יב לִי֙ חֵ֣לֶב וָדָ֔ם נְאֻ֖ם אֲדֹנָ֥י יְהוִֽה׃
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;
Shemirat HaLashon
And especially in our times, when we see with our own eyes in our many sins that the youth who have departed from the Torah have also abandoned the observance of Shabbath and other observances, it certainly devolves upon every father to strengthen his sons in the Torah of the L-rd and to train him in His mitzvoth, as it is written (Mishlei 22:6): 'Train the youth, etc.' And his reward for this will be very great, far greater than that of the preceding generations, as we find in Avoth d'R. Nathan 3:6: "Better a hundred times with suffering than one time without suffering," and (Ezekiel 44:15): "But the Cohanim - the Levites, the sons of Tzaddok, who kept the keeping of My sanctuary when the children of Israel strayed from Me — they shall draw near to Me to serve Me, etc."