Numbers 35:17

14 Three on the other side of Jordan and three in the land of Canaan, to be safe places for flight.

15 For the children of Israel and for the man from another country who is living among them, these six towns are to be safe places, where anyone causing the death of another through error may go in flight.

16 But if a man gives another man a blow with an iron instrument, causing his death, he is a taker of life and is certainly to be put to death.

17 Or if he gives him a blow with a stone in his hand, causing his death, he is a taker of life and is certainly to be put to death.

18 Or if he gave him blows with a wood instrument in his hands, causing his death, he is a taker of life and is certainly to be put to death.

19 He whose right it is to give punishment for blood, may himself put to death the taker of life when he comes face to face with him.

20 If in his hate he put a sword through him, or waiting secretly for him sent a spear or stone at him, causing his death;