Revelation 14:9
And a third angel followed them, saying with a loud voice, If any one worship the beast and his image, and receive the mark on his forehead,
Revelation 14:11
And the smoke of their torment ascendeth for ever and ever: and they have no rest, day and night, who worship the beast and his image, and whosoever receiveth the mark of his name.
Matthew 26:52
Then said Jesus to him, Put up thy sword into it's place; for they that take the sword shall perish by the sword:
Treasury of Scripture Knowledge
Summary
And the LORD said unto him, Therefore whosoever slayeth Cain, vengeance shall be taken on him sevenfold. And the LORD set a mark upon Cain, lest any finding him should kill him.
Therefore
Set a mark, etc
Bible References
Therefore
Matthew 26:52
Then said Jesus to him, Put up thy sword into it's place; for they that take the sword shall perish by the sword:
Set a mark, etc
Revelation 14:9
And a third angel followed them, saying with a loud voice, If any one worship the beast and his image, and receive the mark on his forehead,