Numbers 35:26-28

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

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;

for in the city of his refuge he doth dwell till the death of the chief priest; and after the death of the chief priest doth the man-slayer turn back unto the city of his possession.