Leviticus 23:4-6

The Voice

⁴ Here are times I have appointed for sacred assemblies; you are to celebrate these feasts and declare them publicly at their appointed times. ⁵ In the spring on the fourteenth day of the first month, My Passover begins at first light. ⁶ When the fifteenth day arrives, you are to celebrate the Feast of Unleavened Bread in My honor.

For the next seven days, the only bread you are allowed to eat is unleavened bread.