God would possess men with a great horror and dread of the sin of killing another, even by chance.
If by willful violence, see 1 John 3:15.
Deuteronomy 1
1 When the LORD thy God hath cut off the nations, whose land the LORD thy God giveth thee, and thou succeedest them, and dwellest in their cities, and in their houses;
2 Thou shalt separate three cities for thee in the midst of thy land, which the LORD thy God giveth thee to possess it.
3 Thou shalt prepare thee a way, and divide the coasts of thy land, which the LORD thy God giveth thee to inherit, into three parts, that every slayer may flee thither.
4 ¶ And this is the case of the slayer, which shall flee thither, that he may live: Whoso killeth his neighbour ignorantly, whom he hated not in time past;
5 As when a man goeth into the wood with his neighbour to hew wood, and his hand fetcheth a stroke with the axe to cut down the tree, and the head slippeth from the helve, and lighteth upon his neighbour, that he die; he shall flee unto one of those cities, and live:
6 Lest the avenger of the blood pursue the slayer, while his heart is hot, and overtake him, because the way is long, and slay him; whereas he was not worthy of death, inasmuch as he hated him not in time past.
7 Wherefore I command thee, saying, Thou shalt separate three cities for thee.
8 And if the LORD thy God enlarge thy coast, as he hath sworn unto thy fathers, and give thee all the land which he promised to give unto thy fathers;
9 If thou shalt keep all these commandments to do them, which I command thee this day, to love the LORD thy God, and to walk ever in his ways; then shalt thou add three cities more for thee, beside these three:
10 That innocent blood be not shed in thy land, which the LORD thy God giveth thee for an inheritance, and so blood be upon thee.
11 ¶ But if any man hate his neighbour, and lie in wait for him, and rise up against him, and smite him mortally that he die, and fleeth into one of these cities:
12 Then the elders of his city shall send and fetch him thence, and deliver him into the hand of the avenger of blood, that he may die.
13 Thine eye shall not pity him, but thou shalt put away the guilt of innocent blood from Israel, that it may go well with thee.
14 ¶ Thou shalt not remove thy neighbour’s landmark, which they of old time have set in thine inheritance, which thou shalt inherit in the land that the LORD thy God giveth thee to possess it.
15 ¶ One witness shall not rise up against a man for any iniquity, or for any sin, in any sin that he sinneth: at the mouth of two witnesses, or at the mouth of three witnesses, shall the matter be established.
16 ¶ If a false witness rise up against any man to testify against him that which is wrong;
17 Then both the men, between whom the controversy is, shall stand before the LORD, before the priests and the judges, which shall be in those days;
18 And the judges shall make diligent inquisition: and, behold, if the witness be a false witness, and hath testified falsely against his brother;
19 Then shall ye do unto him, as he had thought to have done unto his brother: so shalt thou put the evil away from among you.
20 And those which remain shall hear, and fear, and shall henceforth commit no more any such evil among you.
21 And thine eye shall not pity; but life shall go for life, eye for eye, tooth for tooth, hand for hand, foot for foot.
Deuteronomy 1 – J. Vernon McGee
Deuteronomy 19:19—Then shall ye do unto him, as he had thought to have done unto his brother.
There is a Nemesis in wrong-doing; evil comes home to roost; what we meditate against others returns on ourselves. They that take the sword shall perish with the sword. The publican who sells drink to debauch sons and fathers, lives to see the drink curse his own family. The man who is treacherous to women lives to see his own sons fall beneath their wiles. Haman erects a gallows for Mordecai, but is hanged upon it himself. Adoni-bezek cut off the toes and thumbs of captive princes, and confessed the rightness of the fate which overtook himself. England imposes opium on China, but presently discovers that it is eating out the heart of her own subjects in India and Burmah. “Whoso causeth the righteous to go astray in an evil way, he shall fall himself into his own pit” (Proverbs 28:10).
And why is all this? Because God sits behind the slight curtain of the present, judging the acts of men. It is not necessary to wait for the conclusion of the present age to see the sentence inflicted. Now the Son of Man sits on the throne of His glory, and before Him the nations are gathered. Nineveh, Babylon, Capernaum, Tyre, Pompeii, the power of Spain, the Empire of Napoleon, have already been condemned to Hades. Now the judgment is set, now the books are opened, now the “Come, ye blessed” (Matthew 25:34), and “Depart…, ye cursed” (Matthew 25:41), are being uttered. God has so made the moral world that the seed of punishment lies hidden in each unkind word, each unchristian act; and it is only necessary to give time enough to show that the man who has sown to his neighbor’s hurt will reap that hurt in his own life. To every man will be rendered according to his deeds, even in this life. —Our Daily Homily