Matthew Henry on 2 Chronicles 30:21–end
After the passover followed the feast of unleavened bread, which continued seven days. How that was observed we are here told, and every thing in this account looks pleasant and lively. 1. Abundance of sacrifices were offered to God in peace-offerings, by which they both acknowledged and implored the favour of God, and on part of which the offerers feasted with their friends during these seven days (Ch2 30:22), in token of their communion with God and the comfort they took in his favour and their reconciliation to him. To keep up this part of the service, that God's altar might be abundantly regaled with the fat and blood and his priests and people with the flesh of the peace-offerings, Heze…
Read the whole note in the consoleJamieson-Fausset-Brown on 2 Chronicles 30:21
the children of Israel . . . kept the feast--The time appointed by the law for the continuance of the feast was seven days [Exo 12:15; Exo 13:6; Lev 23:6]; but in consequence of its having been allowed to fall so long into desuetude, they doubled the period of celebration and kept it fourteen days with unabated satisfaction and joy. Materials for the additional sacrificial meals were supplied by the munificence of the king and the princes.
Adam Clarke on 2 Chronicles 30:22
Spake comfortably unto all the Levites - On such occasions the priests and Levites had great fatigue, and suffered many privations; and therefore had need of that encouragement which this prudent and pious king gave. It is a fine and expressive character given of these men, "They taught the good knowledge of God to the people." This is the great work, or should be so, of every Christian minister. They should convey that knowledge of God to the people by which they may be saved; that is, the good knowledge of the Lord.
John Gill on 2 Chronicles 30:23
And the whole assembly took counsel to keep other seven days,.... They consulted among themselves, and with the king and his nobles about it, who all agreed to it:
and they kept other seven days with gladness; not altogether in the same manner they had kept the preceding seven days; they did not slay and eat passover lambs, nor did they eat unleavened bread, but offered peace offerings, and feasted upon them; and sung the praises of God, and attended to the instructions of the priests and Levites, being in a very agreeable frame of mind for religious exercises.