Sacramental bread adopted the use of unleavened bread due to Liturgical Latinisation. A Host is a portion of bread used for Holy Communion in many Christian churches. In Western Christianity the host is often a thin, round unleavened wafer. In the Roman Rite, unleavened bread is used as in the Jewish Passover or Feast of Unleavened Bread. The Code of Canon Law, Canon 924 requires that the hosts be made from wheat flour and water only and recently made so that there is no danger of spoiling. Hosts are often made by nuns as a means of supporting their religious communities. However,
Pinechas (parsha) one could have both leavened and unleavened bread in one's house. And the Mishnah taught that for the first Passover, one was required to recite the Hallel () when the Passover lamb was eaten; while the second Passover did not require the reciting of Hallel when the Passover lamb was eaten. But both the first and second Passovers required the reciting of Hallel when the Passover lambs were offered, and both Passover lambs were eaten roasted with unleavened bread and bitter herbs. And both the first and second Passovers took precedence over the Sabbath. Rabbi Akiva (or some say Rabban