Give the land rest every seven years.
After the seventh sabbath, 49 years, the 50th year is jubilee, when all returns to its original owner and all debts are cancelled. Houses in cities and foreign slaves are exempt from this - do not need to be returned.
How this is about Jesus
At the beginning of His ministry Jesus alludes to the Jubilee by quoting Isaiah 61:1-2. He brings ultimate liberty, not just financial or political peace and freedom.
Sins this reveals
We don't want to give rest to people and things that serve us. We would exploit them selfishly, but God gives laws for fairness. Those impoverished even by their own sloth into slavery, should have a long range plan (Jubilee) for getting back to independence and productivity (Eph 4:28).