Chronicles I 29:9

9 And the people rejoiced because of the willingness, for they offered willingly to the Lord with a full heart: and king David rejoiced greatly.

Chronicles I 29:9 Meaning and Commentary

1 Chronicles 29:9

Then the people rejoiced, for that they offered willingly
They were not only glad that they had it to offer, but that they had hearts to do it; they found themselves quite free to do the work, and saw it was so with others, which gave them extreme pleasure:

because with perfect heart they offered willingly to the Lord;
not grudgingly, but cheerfully; not pressed and urged to it; not by constraint, but freely, and that with a pure view to the honour and glory of God:

and David the king also rejoiced with great joy;
it made his heart glad exceedingly, now he was old, and just going out of the world, to see this good work in such forwardness, on which his heart had been so much set; it gave him reason to believe it would be set about in good earnest, be carried on with vigour, and brought to perfection.

Chronicles I 29:9 In-Context

7 And they gave for the works of the house of the Lord five thousand talents of gold, and ten thousand gold , and ten thousand talents of silver, and eighteen thousand talents of brass, and a hundred thousand talents of iron.
8 And they who had stone, gave it into the treasuries of the house of the Lord by the hand of Jeiel the Gedsonite.
9 And the people rejoiced because of the willingness, for they offered willingly to the Lord with a full heart: and king David rejoiced greatly.
10 And king David blessed the Lord before the congregation, saying, Blessed art thou, O Lord God of Israel, our Father, from everlasting and to everlasting.
11 Thine, O Lord, the greatness, and the power, and the glory, and the victory, and the might: for thou art Lord of all things that are in heaven and upon the earth: before thy face every king and nation is troubled.

The Brenton translation of the Septuagint is in the public domain.