The only land he did not buy was the land the priests owned. They did not need to sell their land because the king paid them for their work. So they had money to buy food.
At harvest time you must give one-fifth to the king. You may keep four-fifths for yourselves to use as seed for the field and as food for yourselves, your families, and your children.”
Rain and snow fall from the sky and don’t return without watering the ground. They cause the plants to sprout and grow, making seeds for the farmer and bread for the people.
God is the One who gives seed to the farmer and bread for food. He will give you all the seed you need and make it grow so there will be a great harvest from your goodness.