"***** Our churches are to co-operate in the work of spiritual tilling, with the hope of reaping by and by. There is much perversity to be met, much thwarting of holy plans and consecrated effort, because of the evil heart of unbelief. But the work must be done. The soil is stubborn, but the fallow ground must be broken up, the seeds of righteousness must be sown. Pause not, teachers beloved by God, as though doubtful whether to prosecute a labor which will grow as performed. Fail not, neither be discouraged. They that sow in tears shall reap in joy. “We are laborers together with God: ye are God's husbandry, ye are God's building.” 1 Corinthians 3:9 . Remember that you cannot trust in self. 6T 420.2"
"For we are labourers together with God: ye are God’s husbandry, ye are God’s building."
Ellen White directly references 1 Corinthians 3:9 in this passage.