Numbers 28:17

On the fifteenth day of this month there is to be a feast; for seven days let your food be unleavened cakes.

Leviticus 23:6

And on the fifteenth day of the same month is the feast of unleavened bread; for seven days let your food be unleavened bread.

Exodus 12:15-17

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.

Exodus 13:6

For seven days let your food be unleavened cakes; and on the seventh day there is to be a feast to the Lord.

Exodus 23:15

You are to keep the feast of unleavened bread; for seven days let your bread be without leaven, as I gave you orders, at the regular time in the month Abib (for in it you came out of Egypt); and let no one come before me without an offering:

Exodus 34:18

Keep the feast of unleavened bread; for seven days your food is to be bread without leaven, as I gave you orders, at the regular time in the month Abib; for in that month you came out of Egypt.

Deuteronomy 16:3-8

Take no leavened bread with it; for seven days let your food be unleavened bread, that is, the bread of sorrow; for you came out of the land of Egypt quickly: so the memory of that day, when you came out of the land of Egypt, will be with you all your life.

Treasury of Scripture Knowledge

Summary

And in the fifteenth day of this month is the feast: seven days shall unleavened bread be eaten.

Bible References

General references

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.
Exodus 13:6
For seven days let your food be unleavened cakes; and on the seventh day there is to be a feast to the Lord.
Leviticus 23:6
And on the fifteenth day of the same month is the feast of unleavened bread; for seven days let your food be unleavened bread.

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