However, if it is not done intentionally, but God lets it happen, they are to flee to a place I will designate.
NIV
But if he did not lie in wait for him, but God allowed him to fall into his hand, then I will appoint you a place to which he may flee [for protection until duly tried]. [Num. 35:22-28.]AMP
And if a man lie not in wait, but God deliver him into his hand; then I will appoint thee a place whither he shall flee.
KJV