וְלֹֽא־תַחֲנִ֣יפוּ אֶת־הָאָ֗רֶץ אֲשֶׁ֤ר אַתֶּם֙ בָּ֔הּ כִּ֣י הַדָּ֔ם ה֥וּא יַחֲנִ֖יף אֶת־הָאָ֑רֶץ וְלָאָ֣רֶץ לֹֽא־יְכֻפַּ֗ר לַדָּם֙ אֲשֶׁ֣ר שֻׁפַּךְ־בָּ֔הּ כִּי־אִ֖ם בְּדַ֥ם שֹׁפְכֽוֹ׃
So ye shall not pollute the land wherein ye are; for blood, it polluteth the land; and no expiation can be made for the land for the blood that is shed therein, but by the blood of him that shed it.
Related passages and parallel verses for Numbers 35:33.