Deuteronomy 19:5

as when someone goes into the forest with his neighbor to cut wood , and his hand swings the axe to cut down a tree , and the head slips from the handle and strikes his neighbor so that he dies —he may flee to one of these cities and live ,

For instance, a man may go into the forest with his neighbor to cut wood, and as he swings his ax to fell a tree, the head may fly off and hit his neighbor and kill him. That man may flee to one of these cities and save his life.

As when a man goeth into the wood with his neighbour to hew wood, and his hand fetcheth a stroke with the axe to cut down the tree, and the head slippeth from the helve, and lighteth upon his neighbour, that he die; he shall flee unto one of those cities, and live :