John Gill Commentary 2 Chronicles 20:28

"And they came to Jerusalem with psalteries and harps and trumpets unto the house of Jehovah." — 2 Chronicles 20:28 (ASV)

And they came to Jerusalem with psalteries, and harps, and trumpets The three principal instruments of music used in singing the praises of God; these they played upon as they came to the city, and entered it, and passed through it:

unto the house of the Lord ; the temple, there to offer praise and thanksgiving again.