Numbers 35:19-21

Revised Standard Version

¹⁹ The avenger of blood shall himself put the murderer to death; when he meets him, he shall put him to death. ²⁰ And if he stabbed him from hatred, or hurled at him, lying in wait, so that he died, ²¹ or in enmity struck him down with his hand, so that he died, then he who struck the blow shall be put to death; he is a murderer; the avenger of blood shall put the murderer to death, when he meets him.