Numbers 35:33 in the World English Bible
“‘So you shall not pollute the land where you live; for blood pollutes the land. No atonement can be made for the land for the blood that is shed in it, but by the blood of him who shed it.
Context
32 And ye shall take no satisfaction for him that is fled to the city of his refuge, that he should come again to dwell in the land, until the death of the priest.
33 So ye shall not pollute the land wherein ye are: for blood it defileth the land: and the land cannot be cleansed of the blood that is shed therein, but by the blood of him that shed it.
34 Defile not therefore the land which ye shall inhabit, wherein I dwell: for I the LORD dwell among the children of Israel.