Leviticus 25:8-10

“In addition, you must count off seven Sabbath years, seven sets of seven years, adding up to forty-nine years in all. Then on the Day of Atonement in the fiftieth year, blow the ram’s horn loud and long throughout the land. Set this year apart as holy, a time to proclaim freedom throughout the land for all who live there. It will be a jubilee year for you, when each of you may return to the land that belonged to your ancestors and return to your own clan.