Deuteronomy 15:12; Deuteronomy 15:2

12 If any of your people—Hebrew men or women—sell themselves to you and serve you six years, in the seventh year you must let them go free.

2 This is how it is to be done: Every creditor shall cancel any loan they have made to a fellow Israelite. They shall not require payment from anyone among their own people, because the LORD’s time for canceling debts has been proclaimed.