Chapter 25: Jubilee
The Lord speaks to Moses in the Mount Sinai. He tells him that for seven years the children of Israel are to reap and sow the land. But in the eighth year they are to not dress the fields or prune the vineyards, but are supposed to let the land rest. In that same eighth year (or every eight years) the Lord will provide more meat in the wilderness for them to eat, because for that eighth year they will eat an increase in meat.
For every 50 years something special happens, the Jubilee! Every 50 years in the 10th day of the seventh month during the week of Atonement, shall the Jubilee trumpet sound.
The laws of the sale of lands and homes are revealed and Usury is condemned by God.
Chapter 26: Keep the Commandments
Temporal and Spiritual blessings can be for the children of Israel if they follow the commandments of God. If they choose to disobey, then they will be followed by cursing, scourging and desolations in the land. When people repent of their wrongdoings the Lord will have mercy upon them.
7 times more plagues for walking contrary to the laws and commandments of God. (Leviticus 26:21)
Chapter 27: Tithing
Properties are consecrated unto the Lord. Israel is commanded to pay 1/10 of all their increase in crops/flocks and herds. (Leviticus 27:32)