Joshua 20:3
20:3 That the slayer that killeth [any] person {a} unawares
     [and] unwittingly may flee thither: and they shall be your
     refuge from the avenger of blood.

     (a) At unawares and bearing him no grudge.

Joshua 20:5
20:5 And if the {b} 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.

     (b) That is, the nearest kinsman of him that is slain.

Joshua 20:6
20:6 And he shall dwell in that city, until he stand before the
     congregation for {c} judgment, [and] until the death of the
     high priest that shall be in those days: then shall the
     slayer return, and come unto his own city, and unto his own
     house, unto the city from whence he fled.

     (c) Till his cause was proved.

Joshua 20:8
20:8 And on the other side Jordan by Jericho eastward, they
     assigned Bezer in the wilderness upon the plain out of the
     tribe of Reuben, and Ramoth in Gilead out of the tribe of
     Gad, and Golan in Bashan out of the {d} tribe of Manasseh.

     (d) Out of the half tribe of Manasseh beyond the Jordan.

Joshua 20:9
20:9 These were the cities appointed for all the children of
     Israel, and for the stranger that sojourneth among them,
     that whosoever killeth [any] person at unawares might flee
     thither, and not die by the hand of the avenger of blood,
     until he stood before the {e} congregation.

     (e) Before the Judges.