Yoshua 20 : 5 Joshua chapter 20 verse 5

Na kama huyo mwenye kujilipiza kisasi cha damu akimwandamia, ndipo hawatamtoa huyo mwuaji kumtia mkononi mwake huyo; kwa sababu alimpiga mwenziwe naye hakujua, wala hakumchukia tangu hapo.
soma Mlango wa 20

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