Numbers 35:21

35:21 or in enmity struck him with his hand, so that he died; he who struck him shall surely be put to death; he is a murderer: the avenger of blood shall put the murderer to death, when he meets him.
-World English Bible

Other Translation

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.
-King James Version