Numbers 35:33
So ye shall not pollute the land in which ye are : for blood it defileth the land: and the land cannot be cleansed of the blood that is shed in it, but by the blood of him that shed it.So ye shall not pollute the land in which ye are : for blood it defileth the land: and the land cannot be cleansed of the blood that is shed in it, but by the blood of him that shed it.