Exodus 12:18

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 29:23

29:23 and one round flat cake of bread, one perforated cake of oiled bread, and one wafer from the basket of bread made without yeast that is before the Lord.