The revenger of blood himself shall slay the murderer: when he meeteth him, he shall slay him. The revenger of blood - גאל הדם goel haddam, the redeemer of blood; the next in blood to him who was slain. See on Numbers 35:12 (note).
Related Commentaries of Numbers 35:19
Numbers 35:19
19 The revenger of blood himself shall slay the murderer: when he meeteth him, he shall slay him.