Verses

The blood-shedder must die

Genesis 9:5-6 View context

And surely your blood of your lives will I require; at the hand of every beast will I require it, and at the hand of man; at the hand of every man's brother will I require the life of man.

Whoso sheddeth man's blood, by man shall his blood be shed: for in the image of God made he man.

The blood-shedder must not die

Genesis 4:15 View context

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.