Brother Dan, thank you for this answer. Can you maybe point me to the verse in the Old Testament where it state this?
I didn't get it from the OT. I got it from SDA teachings.
Seventh-day Adventists teach that the near the end of time the "mark of the best" of Revelation 14 will be placed upon those who worship on Sunday instead of Saturday. Following are the main points of this doctrine:
Adventists identify the union of Roman Catholicism with civil power as the "beast" of Revelation:
"The beast described in Revelation 13:1-10 is the church-state union that dominated the Christian world for many centuries and was described by Paul as the 'man of sin' (2 Thess. 2:2-4) and by Daniel as the 'little horn' (Den. 7:8, 20-25; 8:9-12). The image of the beast represents that form of apostate religion that will be developed when churches having lost the true spirit of the Reformation, shall unite with the state to enforce their teachings on others."
The Catholic Church, in the Dark Ages, changed the day of worship from Saturday to Sunday, a pagan day of worship.
At the end of time, a conflict will arise between those who worship the beast and his image and those who are the true followers of God. What sets these two groups apart is that one group, the true loyal remnant, keeps Saturday as a holy day, and the other group, the fallen and apostate, keeps Sunday as a holy day.
"One class will advocate a gospel of human devisings and will worship the beast and his image... The other class, in marked contrast, will live by the true gospel and 'keep the commandments of God and the faith of Jesus' (Rev. 14:9,12)... those who reject God's memorial of creatorship--the Bible Sabbath--choosing to worship and honor Sunday...will receive the mark of the beast."
At the end of time, those who keep Sunday as a holy day will seek to destroy those who keep Saturday as a holy day. They will pass laws against the Sabbath-keepers, eventually passing a death-penalty for those who keep Saturday holy. These laws, prophesied by church prophetess Ellen White, are known to Adventists as the National Sunday Law or Universal Sunday Law:
"Those who obey God will experience the wrath of the dragon (Rev. 12:17) and eventually be threatened with death (Rev. 13:15)." These laws will force all to choose which leader they will follow: the beast or God.
5. Jesus will return to put an end to the conflict, and those who kept Saturday as a holy day will "stand together with the Lamb on Mount Zion" while the Sunday-keepers will "receive the full wrath of God and die."