Revelation 14:9
And another, 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 or on his hand,
Revelation 14:11
And the smoke of their torment goeth up for ever and ever; and they have no rest day or night, who worshiped the beast and his image, and whoever receiveth the mark of his name.
Matthew 26:52
Then Jesus saith to him, Put back thy sword into its place; for all they that take the sword will 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 Jesus saith to him, Put back thy sword into its place; for all they that take the sword will perish by the sword.
Set a mark, etc
Revelation 14:9
And another, 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 or on his hand,