'Man slayer' in the Bible

You shall prepare you a way, and divide the territory of your land, which the LORD your God gives you to inherit, into three parts, that every manslayer may flee there.

And this is the case of the manslayer, who shall flee there, that he may live: Whoever kills his neighbor unintentionally, whom he hated not in time past;

Lest the avenger of blood pursue the manslayer, while his anger is hot, and overtake him, because the way is long, and slay him; whereas he was not worthy of death, inasmuch as he hated the victim not in time past.