On the mountain, God commands a sabbatical year for the Land of Israel (called a Shemitah year) every 7 years. seven cycles of shemitah are followed by a 50th year of Jubille (Yovel) - of freedom, liberty restoration and reconciliation.
God promises that if Israel will keep His commandments they will enjoy prosperity and safety; but if they disobey and break His covenant, they will be exiled from their homeland. And yet God promises restoration in the end when the people humble themselves and repent.
For more info: www.voiceforisrael.net