"17 And he that killeth any man shall surely be put to death. 18 And he that killeth a beast shall make it good; beast for beast. 19 And if a man cause a blemish in his neighbour; as he hath done, so shall it be done to him; 20 Breach for breach, eye for eye, tooth for tooth: as he hath caused a blemish in a man, so shall it be done to him again. 21 And he that killeth a beast, he shall restore it: and he that killeth a man, he shall be put to death. 22 Ye shall have one manner of law, as well for the stranger, as for one of your own country: for I am the LORD your God. 23 And Moses spake to the children of Israel, that they should bring forth him that had cursed out of the camp, and stone him with stones. And the children of Israel did as the LORD commanded Moses." — Leviticus 24:17-23 KJV.
THE LAW OF RETALIATION, 17-23.17. Killeth any man — Smiteth the life of a man, whether bond or free. It is obvious that murder by any other means, as by poison, is included under the phrase “smiteth the life.” Put to death — The reason for regarding murder as a capital offence is because it is an act of the highest sacrilege, an outrage on the likeness of God in man. Human life is incomparably the most sacred thing on earth. Hence its destruction demands, as its penalty, the life of the murderer. To suffer a murder to go unavenged was regarded by both Jews and Greeks as a pollution of the land. Numbers 35:31; OEdipus Tyrannus, 100. No punishment is mentioned for attempted suicide; no guilt attached to one who killed a burglar at night in the act, (Exodus 22:2, 3,) or a slave who died of rigorous treatment a few days after his punishment. Exodus 21:20, 21. The execution of this sentence is expressly committed to the goel, the avenger of blood, after the verdict of guilt had been rendered by the proper tribunal, with at least two agreeing witnesses. Numbers 35:19-30. In regal times the sovereign assumed the execution of justice on the murderer as well as the right of pardon. 2 Samuel 13:39.