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.