Numbers 35:22-24

WEB_Strongs(i)
  22 H1920 "‘But if he thrust H6621 him suddenly H3808 without H342 enmity, H7993 or hurled H3627 on him anything H6660 without lying in wait,
  23 H68 or with any stone, H4191 by which a man may die, H3808 not H7200 seeing H5307 him, and cast H4191 it on him, so that he died, H341 and he was not his enemy, H1245 neither sought H7451 his harm;
  24 H5712 then the congregation H8199 shall judge H5221 between the striker H1350 and the avenger H1818 of blood H4941 according to these ordinances;