Deuteronomy 19:6 VOICE

[6] Otherwise, if the distance to the nearest city of refuge is too great, one of the relatives of the friend who was killed is going to feel honor-bound to avenge the dead man's blood, and he'll catch up with him and kill him while he's still furious about his relative's death. This wouldn't be right because the man slaughterer didn't deserve the death sentence. There was no grudge between these friends-the death was accidental.