Deuteronomy 19:5-7

Amplified Bible, Classic Edition

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.

⁷ Therefore I command you, You shall set apart three [refuge] cities.