If you are a SUNday worshiper, you already accepted the mark of the beast!

For the Seal of God is found in His 4th Commandment.

The Seal of God (4th Commandment) Exodus 20 (King James Version)

 8 Remember the sabbath day, to keep it holy.

 9 Six days shalt thou labour, and do all thy work:

 10 But the seventh day is the sabbath of the (LORD thy God): in it thou shalt not do any work, thou, nor thy son, nor thy daughter, thy manservant, nor thy maidservant, nor thy cattle, nor thy stranger that is within thy gates:

 11 For in six days (the LORD) made (heaven and earth, the sea, and all that in them is), and rested the seventh day: wherefore the LORD blessed the sabbath day, and hallowed it.

Those who are sealed in their foreheads (Sabbath Saturday worship) Revelation 7 (King James Version)

2 And I saw another angel ascending from the east, having (the seal of the living God): and he cried with a loud voice to the four angels, to whom it was given to hurt the earth and the sea,

 3 Saying, Hurt not the earth, neither the sea, nor the trees, till we have (sealed the servants of our God in their foreheads).

Those who accept the beast's mark (Sunday worship) Revelation 14 (King James Version)

11 And the smoke of their torment ascendeth up for ever and ever: and they have (no rest day nor night), who worship the beast and his image, and whosoever receiveth (the mark of his name).

 12 Here is the patience of the saints: here are they that (keep the commandments of God, and the faith of Jesus).

 13 And I heard a voice from heaven saying unto me, Write, Blessed are the dead which die in the Lord from henceforth: Yea, saith the Spirit, that (they may rest from their labours); and their works do follow them.