Charles Ellicott Commentary 2 Chronicles 5:6

"And king Solomon and all the congregation of Israel, that were assembled unto him, were before the ark, sacrificing sheep and oxen, that could not be counted nor numbered for multitude." — 2 Chronicles 5:6 (ASV)

Assembled. — (Nô‘ad, to meet at an appointed time and place,Exodus 25:22). Not the same word as in 2 Chronicles 5:2–3 (qâhal), of which the root meaning is probably to call together.

Before the ark. — By the omission of a single Hebrew word [’ ittô ] before this phrase, the whole form of the sentence is altered from that of Kings. There we read “(were) with him before the Ark sacrificing,” etc.

Sacrificed. — Were sacrificing.

And the priests ... — The verse is wholly identical with 1 Kings 8:6 (see Notes there).