Passover laws thumb|left|The label on a bottle of orange juice certifying that it is kosher for Passover Passover has stricter dietary rules, the most important of which is the prohibition on eating leavened bread or derivatives of this, which are known as . This prohibition is derived from Exodus 12:15.
Passover laws thumb|left|The label on a bottle of orange juice certifying that it is kosher for Passover Passover has stricter dietary rules, the most important of which is the prohibition on eating leavened bread or derivatives of this, which are known as . This prohibition is derived from Exodus 12:15.