Numbers 35:22
" 'Or if in an instant he shoved him, not in hostility, or threw something at him without intention,
Exodus 21:13
But if he did not lie in wait {and it was an accident}, I will appoint for you a place to which he may flee.
Numbers 35:11
you will select for yourselves cities for your cities of refuge, that a killer who has killed a person unintentionally can flee there.
Deuteronomy 19:5
{For example}, when somebody goes with his neighbor into the forest to cut wood, and the iron [head] slips from the handle [of the tool] and strikes his neighbor and he dies, [then] he may flee to one of these cities, and [so] he may live.
Joshua 20:3
Anyone who kills a person by accident or unintentionally may flee there; they will be for yourselves a refuge from the avenger of blood.
Joshua 20:5
And if the avenger of blood pursues after him, they will not hand over the killer into his hand, because he killed his neighbor unintentionally, and {he did not hate him previously}.