indeed it came to pass, when the trumpeters and singers were as one, to make one sound to be heard in praising and thanking the Lord, and when they lifted up their voice with the trumpets and cymbals and instruments of music, and praised the Lord, saying: “For He is good, For His mercy endures forever,” that the house, the house of the Lord, was filled with a cloud,
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Even the house of the Lord - Or, according to another reading from the Septuagint, which removes the superfluousness of these words, The…

It came even to pass ... thanking the Lord. — And the trumpeters and the minstrels were to sound aloud, as one man, with one s…

(See Gill on 2 Chronicles 5:1).

God took possession of the temple; he filled it with a cloud. In this way he signified his acceptance of this temple, to be the same to him as the …
Albert Barnes
AlbertBarnes