Deuteronomy 19:19-23

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.

And those which remain shall hear, and fear, and shall henceforth commit no more any such evil among you.

And thine eye shall not pity; but life shall go for life, eye for eye, tooth for tooth, hand for hand, foot for foot.