Joshua 5:11
On the day following Passover on that exact day they ate the produce of the land, unleavened cakes and parched grain.
Leviticus 23:14
You are not to eat bread, parched grain, or fresh grain until that day when you've brought the offering of your God. This is to be an eternal ordinance throughout your generations, wherever you live."
Exodus 12:18-20
In the first month, from the evening of the fourteenth day of the month until the evening of the twenty-first day of the month, you are to eat unleavened bread.
Exodus 13:6-7
You are to eat unleavened bread for seven days, and on the seventh day there is to be a festival to the LORD.
Leviticus 23:6
On the fifteenth day of that month is the Festival of Unleavened Bread to the LORD. For seven days you are to eat unleavened bread.