Numbers 35
32 Ref and ye take no atonement for him to flee unto the city of his refuge, to turn back to dwell in the land, until the death of the priest.
33 Ref `And ye profane not the land which ye `are' in, for blood profaneth the land; as to the land, it is not pardoned for blood which is shed in it except by the blood of him who sheddeth it;