Genesis 9:5,6
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.
Nave's Topical Index—AKJV

Numbers 35:16-21,30-33
And if he smite him with an instrument of iron, so that he die, he is a murderer: the murderer shall surely be put to death.
Nave's Topical Index—AKJV

Deuteronomy 17:6
At the mouth of two witnesses, or three witnesses, shall he that is worthy of death be put to death; but at the mouth of one witness he shall not be put to death.
Nave's Topical Index—AKJV