Divrey Hayamim Bais 7:6

6 And the Kohanim stood at their mishmerot (watches); the Levi’im also with kelei shir Hashem, (musical instruments of Hashem) which Dovid HaMelech had made to give thanks to Hashem?ki l’oham chasdo (for His mercy endureth forever)?whenever Dovid praised by their means; and the Kohanim sounded khatzotzrot (trumpets) opposite them, and kol Yisroel stood.

Divrey Hayamim Bais 7:6 Meaning and Commentary

2 Chronicles 7:6

And the priests waited on their offices
Performed them, some in offering sacrifices, others in blowing trumpets, as it may be explained from the latter part of the verse:

the Levites also with instruments of music of the Lord, which David the
king had made to praise the Lord;
under a divine direction, on which the Levites played to the songs of praise offered to the Lord, and by which they made music sacred to him:

because his mercy endureth for ever;
which, as it was the close of their songs of praise, was the cause of them:

when David praised by their ministry;
the songs sung being composed by him, and the instruments they played upon being of his invention, and used by his order:

and the priests sounded trumpets before them;
or rather over against them, that is, over against the Levites, as they were singing and playing on the instruments of music:

and all Israel stood;
while this sacred and delightful service was performing, they both stood up, and stood by the priests and Levites, and joined with them in praising the Lord.

Divrey Hayamim Bais 7:6 In-Context

4 Then HaMelech and kol HaAm offered zevach before Hashem.

5 And HaMelech Sh’lomo offered zevach of 22,000 bakar, and 120,000 tzon; so HaMelech and kol HaAm dedicated the Beis HaElohim.

6 And the Kohanim stood at their mishmerot (watches); the Levi’im also with kelei shir Hashem, (musical instruments of Hashem) which Dovid HaMelech had made to give thanks to Hashem?ki l’oham chasdo (for His mercy endureth forever)?whenever Dovid praised by their means; and the Kohanim sounded khatzotzrot (trumpets) opposite them, and kol Yisroel stood.

7 Moreover Sh’lomo set apart as kodesh the toch hekhatzer (center of the courtyard) that was in front of the Beis Hashem; for there he offered HaOlot and the chelvei hashelamim (fat of peace offerings), because the Mizbe’ach hanechoshet which Sh’lomo had made was not able to receive the Olot, and the Mincha, and HaChalavim (the fats).

8 Also at the same time Sh’lomo kept the Chag (see v. 9) shivat yamim, and kol Yisroel with him, a Kahal Gadol Me’od, from the Levo (Approach) Chamat unto the Wadi Mitzrayim.