"In vain were the king's threats. He could not turn these noble men from their allegiance to the great Ruler of nations. They had learned from the history of their fathers that disobedience to God is dishonor, disaster, and ruin; that the fear of the Lord is not only the beginning of wisdom but the foundation of all true prosperity. They look with calmness upon the fiery furnace and the idolatrous throng. They have trusted in God, and He will not fail them now. Their answer is respectful, but decided: “Be it known unto thee, O king, that we will not serve thy gods, nor worship the golden image which thou hast set up” ( Daniel 3:18 ). SL 37.2"
"But if not, be it known unto thee, O king, that we will not serve thy gods, nor worship the golden image which thou hast set up."
Ellen White directly references Daniel 3:18 in this passage.