Exodus 21:26

When a man strikes the eye of his slave , male or female , and destroys it, he shall let the slave go free because of his eye .

“An owner who hits a male or female slave in the eye and destroys it must let the slave go free to compensate for the eye.

And if a man smite the eye of his servant, or the eye of his maid, that it perish; he shall let him go free for his eye's sake.