Although we often think of Jesus as a Christian he was a devote Jew who followed all the precepts of Judaism. He was born of a Jewish woman, in a Jewish town in Galilee, was circumcised, studied the Torah, celebrated Jewish feasts, took pilgrimages to Jerusalem, taught in Synagogues, and celebrated Passover with his apostles. So, why is this important to Catholics? It is simple; the origins of the Catholic Mass are rooted in Jewish customs, history and scripture.
Exodus 16:4-6 Then the Lord said to Moses; I am going to rain down bread from heaven for you. Each day the people are to go out and gather their daily portion; thus will I test them to see whether they follow my instructions or not. On the sixth day, however, when they prepare what they bring in, let it be twice as much as they gather on the other days.
Scripture tells us that the Jewish people were waiting for a political messiah who would set them free, a new Exodus, if you will. As the Jews were fleeing Egypt, God took care of them every morning and night for forty years. Each morning in the desert the Jews found dew on the ground and when it dried, it was like flakes and they asked what it was. Moses said, “It is the bread which the Lord has given you to eat.” And, each evening, they were fed quail. The bread was called manna and in the desert, any manna that was not consumed was stored in a tabernacle. A candle was lit next to the tabernacle to indicate that there was manna stored within. The Lord fed the Israelites for 40 years, manna in the morning and quail in the evening. The manna was referred to as “bread from heaven.”
Source: The Jewish Roots of the Eucharist, Brant Pitre
Today the unused consecrated hosts remain in our tabernacle for the sick and dying. When the candle next to it is lit; you know the tabernacle has consecrated hosts in it.
The Tabernacle at St. Andrew The Apostle Church
The Worship Commission