'Blood' in the Bible

It shall be that whoever goes out of the doors of your house into the street, his blood will be on his head, and we will be guiltless. Whoever is with you in the house, his blood shall be on our head, if any hand is on him.

that the manslayer who kills any person accidentally or unintentionally may flee there. They shall be to you for a refuge from the avenger of blood.

If the avenger of blood pursue after him, then they shall not deliver up the manslayer into his hand; because he struck his neighbor unintentionally, and didn't hate him before.

These were the appointed cities for all the children of Israel, and for the alien who lives among them, that whoever kills any person unintentionally might flee there, and not die by the hand of the avenger of blood, until he stands before the congregation.