Numbers 35:24-34

24 Then let the meeting of the people be judge between the man responsible for the death and him who has the right of punishment for blood, acting by these rules:
25 And let the people keep the man responsible for the death safe from the hands of him who has the right of punishment for blood, and send him back to his safe town where he had gone in flight: there let him be till the death of the high priest who was marked with the holy oil.
26 But if ever he goes outside the walls of the safe town where he had gone in flight,
27 And the giver of punishment, meeting him outside the walls of the town, puts him to death, he will not be responsible for his blood:
28 Because he had been ordered to keep inside the safe town till the death of the high priest: but after the death of the high priest the taker of life may come back to the place of his heritage.
29 These rules are to be your guide in judging through all your generations wherever you may be living.
30 Anyone causing the death of another is himself to be put to death on the word of witnesses: but the word of one witness is not enough.
31 Further, no price may be given for the life of one who has taken life and whose right reward is death: he is certainly to be put to death.
32 And no price may be offered for one who has gone in flight to a safe town, for the purpose of letting him come back to his place before the death of the high priest.
33 So do not make the land where you are living unholy: for blood makes the land unholy: and there is no way of making the land free from the blood which has come on it, but only by the death of him who was the cause of it.
34 Do not make unclean the land where you are living and in which is my House: for I the Lord am present among the children of Israel.
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