1 Chronicles 29:14

But who am I, and what is my people, that we should be able to offer so willingly after this sort? for all things {h} come of thee, and of thine own have we given thee. (h) We gave you nothing of our own, but that which we have received from you: for whether the gifts are corporal or spiritual, we receive them all from God, and therefore must give him the glory.

But who [am] I, and what [is] my people, that we should be able to offer so willingly after this sort? for all things [come] of thee, and of thine own have we given thee. But who am I, and what is my people? — This question showeth that David had a low mind in a lofty conversation, υφηλου βιου ταπεινον φρονημα . which is a high commendation. That we should be able to offer so willingly. — "It is God that worketh in us both to will and to do," Philippians 2:13 and he can easily put into the hearts of his richer servants to relieve the poorer; yea, to hold it an honour, as here, that they may be so employed as almoners to the Most High. And of thine own have we given thee. — Tα σα εκ των σων , as that good emperor wrote about his rich communion table in the temple of Sophia in Constantinople, dedicated to Jesus Christ; that is, Thine own things, and of thine own, do we thy servants Justinian and Theodora present unto thee, O thou Son and Word of God, who wast incarnated and crucified for us, beseeching thee graciously to accept the same, … Cedren. Compend. Bernard reporteth of Pope Eugenius, that meeting with a poor but honest bishop, he secretly gave him certain rich jewels wherewith he might present him. In like sort dealeth God by his poor servants, crowning his own graces in them, and accepting them for his own "comeliness," which himself hath "put upon them." Ezekiel 16:14

That we should be able to offer so willingly, i.e. that thou shouldst give us both such riches out of which we should be able to make such an offering, and such a willing and free heart to offer them; both which are thy gifts, and the fruits of thy good grace and mercy to us. Of thine own have we given thee; we return only what we have received, and therefore we do only pay a debt to thee, and do not hereby oblige thee, or deserve any thing from thee.

But who am I,.... Originally dust and ashes, a sinful creature, unworthy to receive anything from God, and of having the honour of doing anything for him: and what is my people: subject to him, the least of all people, separated from the nations round about them, and despised by them: that we should be able to offer so willingly after this sort? that they, who were a poor people, some years ago brought out of Egyptian bondage, should now be possessed of such an affluence, and have such a generous heart and liberal spirit given them, as to contribute in so large and liberal a manner as they had done; all was owing to the goodness of God to them, and the efficacy of his grace upon them: for all things come of thee; all good things, temporal and spiritual; the Lord is the fountain of goodness, and Father of mercies: and of thine own have we given thee; for there is nothing a man has but he has received from the Lord, and therefore can give nothing to him but his own, see Romans 11:35 .

We cannot form a right idea of the magnificence of the temple, and the buildings around it, about which such quantities of gold and silver were employed. But the unsearchable riches of Christ exceed the splendour of the temple, infinitely more than that surpassed the meanest cottage on earth. Instead of boasting of these large oblations, David gave solemn thanks to the Lord. All they gave for the Lord's temple was his own; if they attempted to keep it, death would soon have removed them from it. They only use they could make of it to their real advantage, was, to consecrate it to the service of Him who gave it.

1Ch 29:10-25. His Thanksgiving. 10-19. Wherefore David blessed the Lord—This beautiful thanksgiving prayer was the effusion overflowing with gratitude and delight at seeing the warm and widespread interest that was now taken in forwarding the favorite project of his life. Its piety is displayed in the fervor of devotional feeling—in the ascription of all worldly wealth and greatness to God as the giver, in tracing the general readiness in contributing to the influence of His grace, in praying for the continuance of this happy disposition among the people, and in solemnly and earnestly commending the young king and his kingdom to the care and blessing of God.

The people rejoiced for that they offered willingly - i. e., the munificence of the princes and officers 1 Chronicles 29:6 caused general joy among the people.