29:20-36 As soon as Hezekiah heard that the temple was ready, he lost no time. Atonement must be made for the sins of the last reign. It was not enough to lament and forsake those sins; they brought a sin-offering. Our repentance and reformation will not obtain pardon but in and through Christ, who was made sin, that is, a sin-offering for us. While the offerings were on the altar, the Levites sang. Sorrow for sin must not prevent us from praising God. The king and the congregation gave their consent to all that was done. It is not enough for us to be where God is worshipped, if we do not ourselves worship with the heart. And we should offer up our spiritual sacrifices of praise and thanksgiving, and devote ourselves and all we have, as sacrifices, acceptable to the Father only through the Redeemer.

31. Hezekiah … said, Now ye have consecrated yourselves unto the Lord, come near—This address was made to the priests as being now, by the sacrifice of the expiation offerings, anew consecrated to the service of God and qualified to resume the functions of their sacred office (Ex 28:41; 29:32).

the congregation brought in—that is, the body of civic rulers present.