2 Chr 29:34

רַ֤ק הַכֹּֽהֲנִים֙ הָי֣וּ לִמְעָ֔ט וְלֹ֣א יָֽכְל֔וּ לְהַפְשִׁ֖יט אֶת־כָּל־הָעֹל֑וֹת וַֽיְּחַזְּק֞וּם אֲחֵיהֶ֣ם הַלְוִיִּ֗ם עַד־כְּל֤וֹת הַמְּלָאכָה֙ וְעַ֣ד יִתְקַדְּשׁ֣וּ הַכֹּֽהֲנִ֔ים כִּ֤י הַלְוִיִּם֙ יִשְׁרֵ֣י לֵבָ֔ב לְהִתְקַדֵּ֖שׁ מֵֽהַכֹּהֲנִֽים׃

However, since there were not enough priests to skin all the burnt offerings, their Levite brothers helped them until the work was finished and until the priests had been consecrated. For the Levites had been more diligent in consecrating themselves than the priests had been.