'Blood' in the Bible

And it shall be, that whosoever shall go out of the doors of thy house into the street, his blood shall be upon his head, and we shall be guiltless: and whosoever shall be with thee in the house, his blood shall be on our head, if any hand be upon him.

that the manslayer that killeth any person unwittingly and unawares may flee thither: and they shall be unto you for a refuge from the avenger of blood.

And if the avenger of blood pursue after him, then they shall not deliver up the manslayer into his hand; because he smote his neighbor unawares, and hated him not beforetime.

These were the appointed cities for all the children of Israel, and for the stranger that sojourneth among them, that whosoever killeth any person unwittingly might flee thither, and not die by the hand of the avenger of blood, until he stood before the congregation.