'Free' in the Bible

Yahweh said, "{Surely} I will set you free {to be good} for you, {surely} I will cause the enemy to intercede with you in a time of trouble, and in a time of distress.

to let go each one his [male] slave and each one his female slave, the Hebrew and the free Hebrew, [so that] no one among the Judeans [should] enslave his fellow countryman.

But {afterward} they turned back and they brought back the [male] slaves and the female slaves whom they had let go free, and they subdued them as [male] slaves and female slaves.

"At [the] end of seven years you must let go each one his fellow countryman, the Hebrew who has been sold to you and who has served you six years, and you must let him go free from you." But your ancestors did not listen to me, and they did not incline their ears.

But you turned back and you profaned my name when you brought back each one his [male] slave and each one his female slave, whom you had let go free according to their desire, and you subdued them to be to you as [male] slaves and as female slaves.'

Thus says Yahweh of hosts: "The people of Israel [are] oppressed, and the people of Judah likewise, {for} all their captors have seized them, they refuse to let them go free.