Genyeoh
Genesis
Chapter 4
15
Then the Lord said to him, "Not so! If anyone kills Cain, vengeance shall be taken on him sevenfold." And the Lord put a mark on Cain, lest any who found him should attack him.
Genyeoh's Note
May 3
Thus, the prohibition to slay him is sanctioned by a seven-fold, that is, an ample and complete vengeance, and a sign of protection mercifully vouchsafed to him. The whole dealing of the Almighty was calculated to have a softening, conscience-awakening, and hope-inspiring effect on the murderer's heart.