It is also called "the Feast of Unleavened Bread," because they ate unleavened bread for seven days. Pentecost was celebrated fifty days after the Passover, first of all, because the Hebrew tribes had ...

They are also required to keep a feast of unleavened bread, “as perpetual institution” (Exodus 12:17). In the Eucharist, all these elements are combined to make up Mass as our keeping of the ...