1) Passover food 
Maror (מָרוֹר mārôr) also Marror, refers to the bitter herbs eaten at the Passover Seder in keeping with the biblical commandment `with bitter herbs they shall eat it.` (Exodus 12:8). ==Biblical source== In some listings of the 613 commandments, such as the Minchat Chinuch, the biblical obligation to consume maror is included within the .....
The bitter herbs such as horseradish symbolizing the bitter plight of the enslaved Israelites.
Bitter herbs. Traditionally horseradish served at the Passover Seder.