Numbers 35:19

"And if the avenger of blood pursue after him, then they shall not deliver the slayer up into his hand; because he smote his neighbour unwittingly, and hated him not beforetime."

"Or in enmity smite him with his hand, that he die: he that smote him shall surely be put to death; for he is a murderer: the revenger of blood shall slay the murderer, when he meeteth him."

"Then the elders of his city shall send and fetch him thence, and deliver him into the hand of the avenger of blood, that he may die."

"That the slayer that killeth any person unawares and unwittingly may flee thither: and they shall be your refuge from the avenger of blood."

"Lest the avenger of the blood pursue the slayer, while his heart is hot, and overtake him, because the way is long, and slay him; whereas he was not worthy of death, inasmuch as he hated him not in time past. slay...: Heb. smite him in life in...: Heb. from yesterday the third day"

"And the revenger of blood find him without the borders of the city of his refuge, and the revenger of blood kill the slayer; he shall not be guilty of blood: he...: Heb. no blood shall be to him"

"Then the congregation shall judge between the slayer and the revenger of blood according to these judgments:"

"And they shall be unto you cities for refuge from the avenger; that the manslayer die not, until he stand before the congregation in judgment."