וְהַכֹּהֲנִ֞ים עַל־מִשְׁמְרוֹתָ֣ם עֹמְדִ֗ים וְהַלְוִיִּ֞ם בִּכְלֵי־שִׁ֤יר יְהוָה֙ אֲשֶׁ֨ר עָשָׂ֜ה דָּוִ֣יד הַמֶּ֗לֶךְ לְהֹד֤וֹת לַיהוָה֙ כִּֽי־לְעוֹלָ֣ם חַסְדּ֔וֹ בְּהַלֵּ֥ל דָּוִ֖יד בְּיָדָ֑ם וְהַכֹּהֲנִים֙ מחצצרים [מַחְצְרִ֣ים] נֶגְדָּ֔ם וְכָל־יִשְׂרָאֵ֖ל עֹמְדִֽים׃ (ס)
때에 제사장들은 직분대로 모셔 서고 레위 사람도 여호와의 악기를 가지고 섰으니 이 악기는 전에 다윗 왕이 레위 사람으로 여호와를 찬송하려고 만들어서 여호와의 인자하심이 영원함을 감사케 하던 것이라 제사장은 무리 앞에서 나팔을 불고 온 이스라엘은 섰더라
Rashi on II Chronicles
And the priests...on their watches as David had divided them into twenty-four watches, for each watch to serve its week, and the Levites likewise on their twenty-four watches
Rashi on II Chronicles
to give thanks with musical instruments, for they recited (Ps. 136): “Give thanks to the Lord for He is good, for His loving kindness is eternal.”
Rashi on II Chronicles
with David’s praise The musical instruments with which they recited David’s praise and the thanksgivings were in the Levites’ hands.