Exodus 21:12
"He that smiteth a man, so that he die, shall be surely put to death."
Cross References (ranked by relevance)
Genesis 9:6
Whoso sheddeth man’s blood, by man shall his blood be shed: for in the image of God made he man.
Matthew 26:52
Then said Jesus unto him, Put up again thy sword into his place: for all they that take the sword shall perish with the sword.
Leviticus 24:17
And he that killeth any man shall surely be put to death.
2 Samuel 12:13
And David said unto Nathan, I have sinned against the LORD. And Nathan said unto David, The LORD also hath put away thy sin; thou shalt not die.
Exodus 20:13
Thou shalt not kill.