"You shall tell your child on that day." Rabban Gamaliel said that one needed to mention three things on Passover to discharge one's duty: the Passover offering, unleavened bread (, matzah), and bitter herbs (maror). The Passover offering was sacrificed because God passed over the Israelites' houses in Egypt. They ate unleavened bread because the Israelites were redeemed from Egypt. And they ate bitter herbs because the Egyptians embittered the lives of the Israelites in Egypt. In every generation, all were bound to regard themselves as though they personally had gone out of Egypt, because says, "You shall tell your child in that day: 'It is because of what the Lord did for me when I came out of Egypt.'" Therefore, it was everyone's duty to thank and praise God for performing those miracles for the Israelites and their descendants. God brought them forth from bondage into freedom, from sorrow into joy, from mourning into festivity, from darkness into light, and from servitude into redemption. Therefore, they were to say hallelujah! In the Mishnah, the House of Shammai and the House of Hillel disagreed about how far one should recite into the Hallel, . The House of Shammai maintained that one recited until the words "as a joyous mother of children" in , while the House of Hillel said that one recited until the words "the flint into a fountain of waters" in . The Tosefta and the Jerusalem Talmud reported that the House of Shammai argued to the House of Hillel that since the original Passover meal in Egypt preceded the Exodus, it would be inappropriate at a Passover seder to give thanks for the Exodus. The House of Hillel argued to the House of Shammai that since the Israelites only left Egypt at midday (for which the Jerusalem Talmud cited , which it read to say, "And it came to pass in the middle of that day"), it would still be inappropriate to mention the Exodus on the morning after the seder. The Jerusalem Talmud reported that the House of Hillel concluded that once one has started a religious duty, one should finish it. And Rabbi Abuna bar Sehorah questioned the argument of the House of Shammai, as one will already have mentioned the Exodus from Egypt in the Sanctification blessing said over a cup at the seder's beginning. The Mishnah taught that one concluded with a blessing