Numbers 35:19 KJV
The revenger of blood himself shall slay the murderer: when he meeteth him, he shall slay him.
Numbers 35:19, King James Version
In context
18 Or if he smite him with an hand weapon of wood, wherewith he may die, and he die, he is a murderer: the murderer shall surely be put to death.
19 The revenger of blood himself shall slay the murderer: when he meeteth him, he shall slay him.
20 But if he thrust him of hatred, or hurl at him by laying of wait, that he die;