Leviticus 25:9-10

Then shalt thou cause the trumpet of the jubile to sound on the tenth {day} of the seventh month, in the day of atonement shall ye make the trumpet sound throughout all your land. {of the jubile: Heb. loud of sound} And ye shall hallow the fiftieth year, and proclaim liberty throughout {all} the land unto all the inhabitants thereof: it shall be a jubile unto you; and ye shall return every man unto his possession, and ye shall return every man unto his family.