"All that man receives of God's bounty still belongs to God. Whatever God has bestowed in the valuable and beautiful things of earth is placed in the hands of men to test them—to sound the depths of their love for Him and their appreciation of His favors. Whether it be the treasures of wealth or of intellect, they are to be laid, a willing offering, at the feet of Jesus; the giver saying, meanwhile, with David, “All things come of Thee, and of Thine own have we given Thee.” PP 753.1"
"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."
EGW directly quotes 1 Chronicles 29:14, attributing the sentiment to David and applying it to the concept of giving back to God what is already His.
"Now the days of David drew nigh that he should die; and he charged Solomon his son, saying, I go the way of all the earth: be thou strong therefore, and shew thyself a man; And keep the charge of the Lord thy God, to walk in his ways, to keep his statutes, and his commandments, and his judgments, and his testimonies, as it is written in the law of Moses, that thou mayest prosper in all that thou doest, and whithersoever thou turnest thyself: That the Lord may continue his word which he spake concerning me, saying, If thy children take heed to their way, to walk before me in truth with all their heart and with all their soul, there shall not fail thee (said he) a man on the throne of Israel."
Ellen White directly references 1 Kings 2:1-4 in this passage.