"The Importance of Personal Labor Among the members of our churches there should be more house-to-house labor in giving Bible readings and distributing literature. A Christian character can be symmetrically and completely formed only when the human agent regards it as a privilege to work disinterestedly in the proclamation of the truth and to sustain the cause of God with means. We must sow beside all waters, keeping our souls in the love of God, working while it is day, and using the means the Lord has given us to do whatever duty comes next. Whatever our hands find to do, we are to do it with faithfulness; whatever sacrifice we are called upon to make, we are to make it cheerfully. As we sow beside all waters we shall realize that “he which soweth bountifully shall reap also bountifully.” 2 Corinthians 9:6 . 9T 127"
"But this I say, He which soweth sparingly shall reap also sparingly; and he which soweth bountifully shall reap also bountifully."
Ellen White directly references 2 Corinthians 9:6 in this passage.