Exodus 21:23-27

But if there is further injury, the punishment must match the injury: a life for a life, an eye for an eye, a tooth for a tooth, a hand for a hand, a foot for a foot, a burn for a burn, a wound for a wound, a bruise for a bruise. “If a man hits his male or female slave in the eye and the eye is blinded, he must let the slave go free to compensate for the eye. And if a man knocks out the tooth of his male or female slave, he must let the slave go free to compensate for the tooth.