Leviticus 25:8-11; Leviticus 23:16

8 'And you shall count seven sabbaths of years for yourself, seven times seven years; and the time of the seven sabbaths of years shall be to you forty-nine years.

9 Then you shall cause the trumpet of the Jubilee to sound on the tenth day of the seventh month; on the Day of Atonement you shall make the trumpet to sound throughout all your land.

10 And you shall consecrate the fiftieth year, and proclaim liberty throughout all the land to all its inhabitants. It shall be a Jubilee for you; and each of you shall return to his possession, and each of you shall return to his family.

11 That fiftieth year shall be a Jubilee to you; in it you shall neither sow nor reap what grows of its own accord, nor gather the grapes of your untended vine.

16 Count fifty days to the day after the seventh Sabbath; then you shall offer a new grain offering to the Lord.