Numbers 35:19

35:19 The revenger of blood himself shall slay the murderer: when he meeteth him, he shall slay him.

Numbers 35:21

35:21 Or in enmity smite him with his hand, that he die: he that smote [him] shall surely be put to death; [for] he [is] a murderer: the revenger of blood shall slay the murderer, when he meeteth him.

Numbers 35:27

35:27 And the revenger of blood find him without the borders of the city of his refuge, and the revenger of blood kill the slayer; he shall not be guilty of blood:

Numbers 35:33

35:33 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.