Deuteronomy 19:4-6

Amplified Bible, Classic Edition

⁴ And this is the case of the slayer who shall flee there in order that he may live. Whoever kills his neighbor unintentionally, for whom he had no enmity in time past—

⁵ As when a man goes into the wood with his neighbor to hew wood, and his hand strikes with the ax to cut down the tree, and the head slips off the handle and lights on his neighbor and kills him—he may flee to one of those cities and live;

⁶ Lest the avenger of the blood pursue the slayer while his [mind and] heart are hot with anger and overtake him, because the way is long, and slay him even though the slayer was not worthy of death, since he had not been at enmity with him previously.