What is the biblical basis for the belief by Seventh-day Adventists that evangelized Gentiles should keep the Sabbath?

Which passages of Scripture are canonically or typically cited by Seventh-day Adventists in defense of the belief that evangelized Gentiles are to keep the Sabbath (sunset Friday to sunset Saturday) the same as the Jews in the Old Covenant? How do they normally interpret those passages in order to come to that conclusion?