וְכָל־הַקָּהָל֙ מִֽשְׁתַּחֲוִ֔ים וְהַשִּׁ֣יר מְשׁוֹרֵ֔ר וְהַחֲצֹצְר֖וֹת מחצצרים [מַחְצְרִ֑ים] הַכֹּ֕ל עַ֖ד לִכְל֥וֹת הָעֹלָֽה׃
And all the congregation prostrated themselves, and the singers sang, and the trumpeters sounded; all this continued until the burnt-offering was finished.
Read midrashic interpretation of II Chronicles 29:28: and classical rabbinic exegesis.