"an eye for an eye" money. You say "money," but perhaps an eye (literally) is intended? R. Elazar was wont to say (Leviticus 24:21) "One who strikes a beast shall pay for it, and one who strikes a man shall be put to death." Scripture likens the injuries of a man to the injuries of a beast, and the injuries of a beast to the injuries of a man. And just as the injuries of a beast are subject to monetary payment, so, the injuries of a man.