MISHNA: Rabban Gamliel would say: Anyone who did not say these three matters on Passover has not fulfilled his obligation: The Paschal lamb, matza, and bitter herbs. When one mentions these matters, he must elaborate and explain them: The Paschal lamb is brought because the Omnipresent passed over [pasaḥ] the houses of our ancestors in Egypt, as it is stated: “That you shall say: It is the sacrifice of the Eternal’s Paschal offering for Godself passed over the houses of the children of Israel in Egypt, when God smote the Egyptians, and delivered our houses” (Exodus 12:27). Rabban Gamliel continues to explain: The reason for matza is because our ancestors were redeemed from Egypt, as it is stated: “And they baked the dough that they took out of Egypt as cakes of matzot, for it was not leavened, as they were thrust out of Egypt and could not tarry, neither had they prepared for themselves any victual” (Exodus 12:39). The reason for bitter herbs is because the Egyptians embittered our ancestors’ lives in Egypt, as it is stated: “And they embittered their lives with hard service, in mortar and in brick; in all manner of service in the field, all the service that they made them serve was with rigor” (Exodus 1:14). The tanna of the mishna further states: In each and every generation a person must view himself as though they personally left Egypt, as it is stated: “And you shall tell your child on that day, saying: It is because of this which the Eternal did for me when I came forth out of Egypt” (Exodus 13:8). In every generation, each person must say: “This which the Eternal did for me,” and not: This which the Eternal did for my ancestors. The mishna continues with the text of the Haggadah. Therefore we are obligated to thank, praise, glorify, extol, exalt, honor, bless, revere, and laud [lekales] the One who performed for our ancestors and for us all these miracles: God took us out from slavery to freedom, from sorrow to joy, from mourning to a Festival, from darkness to a great light, and from enslavement to redemption. And we will say before God: Halleluya. At this point one recites the hallel that is said on all joyous days. Since one does not complete hallel at this point in the seder, the mishna asks: Until where does one recite hallel? Beit Shammai say: Until “Who makes the barren woman dwell in her house as a joyful mother of children, halleluya” (Psalms 113:9). And Beit Hillel say: Until “Who turned the rock into a pool of water, the flint into a fountain of waters” (Psalms 114:8). And one concludes this section of hallel with a blessing that refers to redemption. Rabbi Tarfon says that although one should recite: Who redeemed us and redeemed our forefathers from Egypt, one who did so would not conclude with the formula: Blessed are You, God. Rabbi Akiva says that one recites a different version of this blessing: So too, the Eternal our God and the God of our ancestors will bring us to future holidays and Festivals in peace, happy over the building of Your city and joyous in Your service. And there we will eat from the Paschal lamb and other offerings, etc., until: Blessed are You, God, Who redeemed Israel.