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)
און די כּהנים זײַנען געשטאַנען אױף זײערע װאַכן, און די לוִיִים מיט כּלֵי-זֶמֶר פֿאַר דעם געזאַנג פֿון גאָט, װאָס דוד המלך האָט געמאַכט אױף צו געבן אַ דאַנק צו גאָט, װײַל אױף אײביק איז זײַן חסד, מיט אַ לױבונג פֿון דודן, דורך זײער האַנט; און די כּהנים האָבן געטרומײטערט אַקעגן זײ; און גאַנץ ישׂראל זײַנען געשטאַנען.
Rashi
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
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
with David’s praise The musical instruments with which they recited David’s praise and the thanksgivings were in the Levites’ hands.
Rashi
and the priests were sounding the trumpets opposite them For it was incumbent upon them to play music with the trumpets, as it is said (Num. 10: 8): “And the sons of Aaron, the priests, shall blow [with the trumpets].”