John Gill Commentary 2 Chronicles 30:21

"And the children of Israel that were present at Jerusalem kept the feast of unleavened bread seven days with great gladness; and the Levites and the priests praised Jehovah day by day, [singing] with loud instruments unto Jehovah." — 2 Chronicles 30:21 (ASV)

And the children of Israel that were present at Jerusalem kept
the feast of unleavened bread seven days with great gladness
Which, according to the law of Moses, were always to follow the passover, (Exodus 12:18Exodus 12:19)

and the Levites and the priests praised the Lord day by day, singing
with loud instruments unto the Lord ;
or instruments of strength ^F20 ; so called not from the matter of them, or manner in which they were made, but either from the sound of them, as our version, or from the strength and power of God, which they set forth in praise; the Targum is,

``with instruments of praise,'' and so the word is sometimes used, see (Psalms 8:2) compared with (Matthew 21:16) , the priests blew with trumpets, and the Levites played on harps, psalteries and this they did every day when the sacrifices were offered, during the seven days of unleavened bread.

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FOOTNOTES:

• F20: (ze ylkb) "cum instrumentis fortitudinis", Vatablus.