Numbers 35:24

21 or in enmity he hath smitten him with his hand, and he dieth; the smiter is certainly put to death; he is a murderer; the redeemer of blood doth put the murderer to death in his coming against him.

22 `And if, in an instant, without enmity, he hath thrust him through, or hath cast at him any instrument, without lying in wait;

23 or with any stone wherewith he dieth, without seeing, and causeth it to fall upon him, and he dieth, and he is not his enemy, nor seeking his evil;

24 then have the company judged between the smiter and the redeemer of blood, by these judgments.

25 `And the company have delivered the man-slayer out of the hand of the redeemer of blood, and the company have caused him to turn back unto the city of his refuge, whither he hath fled, and he hath dwelt in it till the death of the chief priest, who hath been anointed with the holy oil.

26 `And if the man-slayer at all go out from the border of the city of his refuge whither he fleeth,

27 and the redeemer of blood hath found him at the outside of the border of the city of his refuge, and the redeemer of blood hath slain the man-slayer, blood is not for him;