Genesis 9:6
Whoever sheds the blood of man, by man his blood will be shed; for in His own image God has made mankind.

Numbers 35:31-33
You are not to accept a ransom for the life of a murderer who deserves to die; he must surely be put to death. / Nor should you accept a ransom for the person who flees to a city of refuge and allow him to return and live on his own land before the death of the high priest. / Do not pollute the land where you live, for bloodshed pollutes the land, and no atonement can be made for the land on which the blood is shed, except by the blood of the one who shed it.

Exodus 21:12-14
Whoever strikes and kills a man must surely be put to death. / If, however, he did not lie in wait, but God allowed it to happen, then I will appoint for you a place where he may flee. / But if a man schemes and acts willfully against his neighbor to kill him, you must take him away from My altar to be put to death.

Deuteronomy 19:11-13
If, however, a man hates his neighbor and lies in wait, attacks him and kills him, and then flees to one of these cities, / the elders of his city must send for him, bring him back, and hand him over to the avenger of blood to die. / You must show him no pity. You are to purge from Israel the guilt of shedding innocent blood, that it may go well with you.

Matthew 26:52
“Put your sword back in its place,” Jesus said to him. “For all who draw the sword will die by the sword.

Romans 13:4
For he is God’s servant for your good. But if you do wrong, be afraid, for he does not carry the sword in vain. He is God’s servant, an agent of retribution to the wrongdoer.

Revelation 13:10
“If anyone is destined for captivity, into captivity he will go; if anyone is to die by the sword, by the sword he must be killed.” Here is a call for the perseverance and faith of the saints.

Psalm 55:23
But You, O God, will bring them down to the Pit of destruction; men of bloodshed and deceit will not live out half their days. But I will trust in You.

Ezekiel 18:10-13
Now suppose that man has a violent son, who sheds blood or does any of these things, / though the father has done none of them: Indeed, the son eats at the mountain and defiles his neighbor’s wife. / He oppresses the poor and needy; he commits robbery and does not restore a pledge. He lifts his eyes to idols; he commits abominations. ...

Isaiah 59:7
Their feet run to evil; they are swift to shed innocent blood. Their thoughts are sinful thoughts; ruin and destruction lie in their wake.

Jeremiah 22:17
“But your eyes and heart are set on nothing except your own dishonest gain, on shedding innocent blood, on practicing extortion and oppression.”

1 John 3:15
Everyone who hates his brother is a murderer, and you know that eternal life does not reside in a murderer.

Matthew 5:21-22
You have heard that it was said to the ancients, ‘Do not murder’ and ‘Anyone who murders will be subject to judgment.’ / But I tell you that anyone who is angry with his brother will be subject to judgment. Again, anyone who says to his brother, ‘Raca,’ will be subject to the Sanhedrin. But anyone who says, ‘You fool!’ will be subject to the fire of hell.

James 2:13
For judgment without mercy will be shown to anyone who has not been merciful. Mercy triumphs over judgment.

1 Kings 2:31-34
And the king replied, “Do just as he says. Strike him down and bury him, and so remove from me and from the house of my father the innocent blood that Joab shed. / The LORD will bring his bloodshed back upon his own head, for without the knowledge of my father David he struck down two men more righteous and better than he when he put to the sword Abner son of Ner, commander of Israel’s army, and Amasa son of Jether, commander of Judah’s army. / Their blood will come back upon the heads of Joab and his descendants forever; but for David, his descendants, his house, and his throne, there shall be peace from the LORD forever.” ...