children of israel didn't have time for the dough to rise before they left egypt in haste. >> reporter: in the passover the wine refers to... the blood refers to the blood they smeared on the doorposts of the houses, because god passed over the houses. >> and, the part of the meal, the bread one would be eating would be thin wafers, that of course is how the principle or the practice of wafer and wine has come into communion in christian usage. as the church separated itself from the synagogue, so aspects of jewish observance were lost and all that remained was the communion of eating the bread and drinking the wine in remembrance of jesus' life. >> reporter: the word "christian" was not used until more than 30 years after jesus died and simply meanings those who believe jesus was christ, the jewish messiah.