Leviticus 25:5 "That which grows of its own accord of your harvest, you shall not reap"

During the Shemitah year, many crops that had been planted during the sixth year continue to grow on their own and become ripe. We are allowed to eat those crops, but we must harves them differently than we normally would.

For example, instead of collecting the entire crop at once and packaging it, we pick only the amount that we need to use in the immediate future. We are not permitted to harvest those crops in the same manner which we do every other year.