Moses orders that, when Israel takes possession of the land, three cities of refuge be set apart and the roads to them prepared. Their purpose is that anyone who kills a person unintentionally, with no earlier hostility, can flee there and save his life. One example is two men cutting wood when the iron head slips from the axe and kills his companion. If God enlarges the territory, three more cities are to be added.
The text distinguishes carefully. Someone who kills out of hatred, lying in wait for his neighbor, is not saved in the city of refuge: the elders of his own city will hand him over to the avenger of blood, and Israel must purge innocent blood from its midst. Moses then adds that no one may move his neighbor's boundary marker, set by earlier generations in the inheritance.
Next he treats witnesses. A single witness is not enough to convict anyone of any wrongdoing; the testimony of two or three is required. If a malicious witness accuses another falsely, both parties appear before the Lord, before the priests and judges. If the witness is shown to have lied, he is to receive what he meant to do to his brother, so that others will be deterred. The chapter closes with the principle of showing no pity: life for life, eye for eye, tooth for tooth, hand for hand and foot for foot.