Exodus 12:17-18

12:17 So you will keep the Feast of Unleavened Bread, because on this very day I brought your regiments out from the land of Egypt, and so you must keep this day perpetually as a lasting ordinance. 12:18 In the first month, from the fourteenth day of the month, in the evening, you will eat bread made without yeast until the twenty-first day of the month in the evening.

Exodus 16:12

16:12 “I have heard the murmurings of the Israelites. Tell them, ‘During the evening you will eat meat, and in the morning you will be satisfied with bread, so that you may know that I am the Lord your God.’”

Exodus 16:15

16:15 When the Israelites saw it, they said to one another, “What is it?” because they did not know what it was. Moses said to them, “It is the bread that the Lord has given you for food.

Exodus 29:2

29:2 and bread made without yeast, and perforated cakes without yeast mixed with oil, and wafers without yeast spread with oil – you are to make them using fine wheat flour.

Exodus 29:34

29:34 If any of the meat from the consecration offerings or any of the bread is left over until morning, then you are to burn up what is left over. It must not be eaten, because it is holy.

Exodus 34:28

34:28 So he was there with the Lord forty days and forty nights; he did not eat bread, and he did not drink water. He wrote on the tablets the words of the covenant, the ten commandments.