Sifrei Devarim 130

¹(Devarim 16:3) "You shall not eat upon it chametz ": R. Yehudah says: Whence is it derived that if one eats chametz (on Pesach eve) from the sixth hour on he transgresses a negative commandment? From "You shall not eat upon it (i.e., from the time of the sacrifice of the Paschal offering, [from the sixth hour on]) chametz ." ²R. Shimon said: Is this so? (i.e., Is this the derivation?) Is it not written "You shall not eat upon it chametz " — "seven days shall you eat upon it matzoth"? Whoever is subsumed in "eat matzoh" is subsumed in "You shall not eat chametz " and whoever is not subsumed in "eat matzoh" is not subsumed in "You shall not eat chametz ." ³"the bread of affliction": to exclude chalut (a paste stirred in hot water) and pan-cakes. ⁴I might think that one could fulfill his obligation (of "bread of affliction") only with flour of the second course; it is, therefore, written "You shall eat matzoth upon it" — even the (extra fine) matzoh of King Solomon. If so, why is it written "bread of affliction"? To exclude chalut and pan-cakes. ⁵R. Shimon says: Why is it called "bread of affliction"? Because of the affliction that they suffered in Egypt. ⁶"For in haste did you leave the land of Egypt.": I might think the haste of both Israel and Egypt. It is, therefore, written (Shemoth 11:7) "And against all the children of Israel a dog shall not sharpen its tongue" — Say, then, it was only Egypt that was in haste. ⁷"so that you remember the days of your leaving the land of Egypt": This is as R. Elazar b. Azaryah said: I am like one who is seventy years old, and I did not merit reciting the exodus from Egypt at night (in the blessing after the Shema ) until Ben Zoma expounded "so that you remember your leaving the land of Egypt all the days of your life." "the days of your life" — the days; " all the days of your life" — the nights. The sages say: "the days of your life" — this world; " all the days of your life" — including the days of the Messiah.