Hagh HaMassot - Consumption
Our Sages wrote: We are required to eat unleavened bread all through the seven
days of Hagh HaMassot as a matter of law. It is not voluntary. It is written, "Seven
days you shall eat unleavened bread" (Shemot 13.6), and, "Unleavened bread
shall be eaten these seven days" (Shemot 13.7). The seven days of Hagh
then, are to be complete, both at their beginning and end, as it is written,
"In the first month, on the fourteenth day of the month, at evening, you
shall eat unleavened bread, until the twenty-first day of the month at evening"
(Shemot 12.18). Furthermore, upon the Pesah sacrifice it is written, "You
shall not eat with it any leaven, but for seven days you shall eat it with
unleavened bread, the bread of poverty" (Devarim 16.3).