Joshua 20:3-5

The Voice

³ so that anyone who accidentally or unintentionally kills a person may flee there. These cities shall be set up as a refuge from anyone seeking blood revenge. ⁴ If the slayer flees to one of these cities, he can stand at the entrance of the gate of the city and explain the case to the elders of that city; then the fugitive will be taken into the city and given a place, and he will live among them. ⁵ If the person seeking to avenge in blood comes after him, the people of the city may not give up the slayer since the neighbor was killed by mistake and there was no premeditation or prior hatred.