"Ministers should present the sure word of prophecy as the foundation of the faith of Seventh-day Adventists. The prophecies of Daniel and the Revelation should be carefully studied, and in connection with them the words, “Behold the Lamb of God, which taketh away the sin of the world.” [ John 1:29 .] GW 148.1"
"The next day John seeth Jesus coming unto him, and saith, Behold the Lamb of God, which taketh away the sin of the world."
Ellen White directly references John 1:29 in this passage.
"I am instructed to say, Gather from the Scriptures the proofs that God has sanctified the seventh day, and let these proofs be read before the congregation. Let those who have not heard the truth be shown that all who turn aside from a plain “Thus saith the Lord,” must suffer the result of their course. In all ages the Sabbath has been the test of loyalty to God. “It is a sign between Me and the children of Israel forever,” the Lord declares. [ Exodus 31:17 .] GW 148.4"
"It is a sign between me and the children of Israel for ever: for in six days the Lord made heaven and earth, and on the seventh day he rested, and was refreshed."
Ellen White directly references Exodus 31:17 in this passage.