"“We do not,” it was said, “question the need of missions in foreign lands. But we do question the right of those who claim to have present truth to pass by millions of human beings in their own country, many of whom are as ignorant as the heathen. Why is it that so little is done for the colored people of the South, many of whom are ignorant and destitute, and need to be taught that Christ is their Creator and Redeemer? How can they believe in Him of whom they have not heard? How can they hear without a preacher? And how can one preach except he be sent? 7T 224.1"
"How then shall they call on him in whom they have not believed? and how shall they believe in him of whom they have not heard? and how shall they hear without a preacher?"
EGW directly quotes and paraphrases Romans 10:14, making it an explicit allusion. The context is also very similar, discussing the need for preachers to reach those who have not heard the gospel.