The Feast of Sabbatical Year: Enactments Respecting: Cessation of all Field Labour
Source: TTT
Leviticus 25:4, 5
But in the seventh year there shall be a Sabbath of complete rest for the land—a Sabbath to the LORD. You are not to sow your field or prune your vineyard. / You are not to reap the aftergrowth of your harvest or gather the grapes of your untended vines. The land must have a year of complete rest.