Num Numbers, chapter Book of Numbers, chapter 35
And if he push him out of sin'ah (hatred), or hurl upon him bitzediyyah (with intention, by laying in wait) that he die; Deu 19:11Or in eivah (enmity) strike him with his yad, that he die; he that struck him shall surely be put to death; for he is a rotze'ach; the Go'el HaDahm shall slay the rotze'ach, when he meeteth him. Deu 19:12