John Gill Commentary 2 Chronicles 29:31

"Then Hezekiah answered and said, Now ye have consecrated yourselves unto Jehovah; come near and bring sacrifices and thank-offerings into the house of Jehovah. And the assembly brought in sacrifices and thank-offerings; and as many as were of a willing heart [brought] burnt-offerings." — 2 Chronicles 29:31 (ASV)

Then Hezekiah answered and said Or proceeded to say, as follows.

now you have consecrated yourselves to the Lord; having entered anew on the performance of their office, filling their hands with sacrifices, as the words signify.

come near, and bring sacrifices and thank offerings into the house of the Lord; which the people were to put into their hands to offer for them.

and the congregation brought in sacrifices and thank offerings; peace offerings, part of which the offerers had to feast on with their friends so expressing their joy and thankfulness on this occasion.

and as many as were of a free heart burnt offerings; of which they had no share, but were wholly the Lord's; and which was a greater proof of their liberality, and so of their sincere and cordial thankfulness.