12 If any one smite another and he die, he shall be put to death.
Exodus 21:12 Cross References - Thomson
Genesis 9:6
6 He who sheddeth man's blood shall for it have his own blood poured out; for in an image of God I have made man.
Exodus 20:13
13 Thou shalt not commit adultery.
Leviticus 24:17
17 And whosoever smiteth another so that he die, let him be put to death.
Numbers 35:16-24
16 But if he hath smitten him with an instrument of iron, and he die, he is a murderer; let the murderer be put to death.
17 And if he hath smitten him with a stone out of his hand, by which he might be killed, and he die; he is a murderer; let the murderer be put to death.
18 And if he hath smitten him with any instrument of wood out of his hand, by which he might be killed, and he die; he is a murderer; let the murderer be put to death.
19 The avenger of blood himself shall kill him. When he meeteth him he shall slay him.
20 And if, through hatred, he hath pushed him down, or thrown at him from ambush, any instrument whatever, and he die;
21 or if on account of an old grudge he hath smitten him with his hand, and he die; let him who smote be put to death: he is a murderer; let the murderer be put to death. The avenger of blood shall slay the murderer when he meeteth him.
22 But if on a sudden, not through malice aforethought, he hath pushed him down, or thrown any instrument at him, not from ambush,
23 nor with any stone by which he might be killed, or not seeing him, and it light upon him, and he die, and he was not his enemy, nor seeking to do him any injury,
24 the congregation shall judge between him who smote, and the avenger of blood, according to these rules of decision;
Numbers 35:30-31
Deuteronomy 19:11-13
11 But there must not be among you one guilty of blood. If therefore there be among you a man who hateth his neighbour, and who shall lie in wait for him, and rise up against him, and smite him so that he die, and flee to one of these cities;
12 the senate of his city shall send and take him thence, and deliver him into the hands of the avenger of blood, and he shall be put to death.
13 Thine eye shall not spare him. So shalt thou purge away guiltless blood from Israel, and it shall be well with thee.
2 Samuel 12:13
13 Then David said to Nathan, I have sinned against the Lord. And Nathan said to David, The Lord hath put away thy sin. Thou shalt not die.
Matthew 26:52
52 Thereupon Jesus saith to him, Return thy sword to its place. For are all who have taken a sword to perish by a sword?