Exodus 12:18

In the first month, from the evening of the fourteenth day, let your food be unleavened bread till the evening of the twenty-first day of the month.

Exodus 12:15

For seven days let your food be unleavened bread; from the first day no leaven is to be seen in your houses: whoever takes bread with leaven in it, from the first till the seventh day, will be cut off from Israel.

Leviticus 23:5-8

In the first month, on the fourteenth day of the month at nightfall, is the Lord's Passover;

Exodus 12:1-2

And the Lord said to Moses and Aaron in the land of Egypt,

Numbers 28:16-25

And in the first month, on the fourteenth day of the month, is the Lord's Passover.

Treasury of Scripture Knowledge did not add

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain