Leviticus 25:10

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.

Hallow the fiftieth year. Much difference of opinion exists as to whether the jubilee was observed on the 49th year, or in round numbers it is called the 50th. The prevailing opinion, both in ancient and modern times, has been in favour of the latter.