In the Jewish calendar, there is a year's rest every seven years. In this year, people are not allowed to harvest things that grow naturally in the fields, but let the poor enjoy them. There is an Amnesty year every 49 years. In this year, the country will implement Amnesty, people will forgive each other's debts, the land sold will be returned to the original owners, and slaves will be released as free men. In fact, these two special years of Jews regularly adjusted the relationship between people in order to make the society more stable and harmonious.