'Free' in the Bible

“If you buy a Hebrew slave, he shall serve for six years; but on the seventh he shall go out as a free man without payment.

But if the slave plainly says, ‘I love my master, my wife and my children; I will not go out as a free man,’

“If a man sells his daughter as a female slave, she is not to go free as the male slaves do.

“If a man strikes the eye of his male or female slave, and destroys it, he shall let him go free on account of his eye.

And if he knocks out a tooth of his male or female slave, he shall let him go free on account of his tooth.