'Man slayer' in the Bible

that a manslayer might flee there, who unintentionally slew his neighbor without having enmity toward him in time past; and by fleeing to one of these cities he might live:

You shall prepare the roads for yourself, and divide into three parts the territory of your land which the Lord your God will give you as a possession, so that any manslayer may flee there.

“Now this is the case of the manslayer who may flee there and live: when he kills his friend unintentionally, not hating him previously—

otherwise the avenger of blood might pursue the manslayer in the heat of his anger, and overtake him, because the way is long, and take his life, though he was not deserving of death, since he had not hated him previously.