Numbers 35:21 in the World English Bible
or in hostility 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.
Context
20 But if he thrust him of hatred, or hurl at him by laying of wait, that he die;
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.
22 But if he thrust him suddenly without enmity, or have cast upon him any thing without laying of wait,