English: Scripture says “You shall not eat chametz upon it; seven days you shall eat matzos upon it.” Things that can come to leavening — a person fulfills his obligation with them as matzah; those that do not come to leavening but only to spoilage are excluded.
Type of Learning
Qualification of what counts as matzah: only species capable of becoming chametz.
What Is Learned
One fulfills the mitzvah only with grains that can leaven; rice and similar species that only spoil are excluded.