Deuteronomy 19 - Webster's Bible
5 As when a man goeth into the wood with his neighbor to hew wood, and his hand maketh a stroke with the ax to cut down the tree, and the head slippeth from the helve, and falleth upon his neighbor, that he dieth: he shall flee to one of these cities, and live:
6 Lest the avenger of blood shall 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.
9 If thou shalt keep all these commandments to do them, which I command thee this day, to love the LORD thy God, and to walk ever in his ways; then shalt thou add three cities more for thee, besides these three:
15 One witness shall not rise up against a man for any iniquity, or for any sin, in any sin that he sinneth; at the mouth of two witnesses, or at the mouth of three witnesses, shall the matter be established.