וַיֹּ֣אמֶר לַ֠לְוִיִּם המבונים [הַמְּבִינִ֨ים] לְכָל־יִשְׂרָאֵ֜ל הַקְּדוֹשִׁ֣ים לַיהוָ֗ה תְּנ֤וּ אֶת־אֲרוֹן־הַקֹּ֙דֶשׁ֙ בַּ֠בַּיִת אֲשֶׁ֨ר בָּנָ֜ה שְׁלֹמֹ֤ה בֶן־דָּוִיד֙ מֶ֣לֶךְ יִשְׂרָאֵ֔ל אֵין־לָכֶ֥ם מַשָּׂ֖א בַּכָּתֵ֑ף עַתָּ֗ה עִבְדוּ֙ אֶת־יְהוָ֣ה אֱלֹֽהֵיכֶ֔ם וְאֵ֖ת עַמּ֥וֹ יִשְׂרָאֵֽל׃
他對那些教導全以色列、歸永恆者為聖的利未人說：«你們要把聖約櫃安放在以色列王大衛的兒子所羅門所建造的殿裡；你們不必再用肩膀扛抬了。現在你們要事奉永恆者你們的上帝，並服事祂的子民以色列。»
Rashi
Place the Holy Ark According to its simple meaning, [they were to return it to its place] because Manasseh and Amon had removed the Holy Ark and placed their graven images in its place, as is proven above (33:7) concerning Manasseh: “And he placed the graven image of the idol, etc.” Therefore, Josiah commanded to return it and to place the Ark in the place that Solomon had built for it, but our Rabbis said (Yoma 42b) that he commanded the Levites to hide it there.
Rashi
you have no burden on the shoulders This is another argument and the beginning of a statement. He said to them. You have no more toil of carrying a burden on your shoulders, i.e., all the vessels of the House of the Lord. You can no longer say, “Because of the toil of the burdens on our shoulders, we cannot serve the Lord and His people.” Therefore, from now on, serve the Lord your God with song and His people Israel by slaughtering and flaying their Passover sacrifices, as is proven below (verse 6): “And slaughter the Passover sacrifice and prepare yourselves, etc.”