Numbers 35:28 BBE

²⁶  But if ever he goes outside the walls of the safe town where he had gone in flight,

²⁷  And the giver of punishment, meeting him outside the walls of the town, puts him to death, he will not be responsible for his blood:

²⁸  Because he had been ordered to keep inside the safe town till the death of the high priest: but after the death of the high priest the taker of life may come back to the place of his heritage.

²⁹  These rules are to be your guide in judging through all your generations wherever you may be living.

³⁰  Anyone causing the death of another is himself to be put to death on the word of witnesses: but the word of one witness is not enough.