Numbers 28:17

On the fifteenth day of this month shall be a feast, unleavened bread shall be eaten for seven days.

Leviticus 23:6

Then on the fifteenth day of the same month there is the Feast of Unleavened Bread to the Lord; for seven days you shall eat unleavened bread.

Exodus 12:15-17

Seven days you shall eat unleavened bread, but on the first day you shall remove leaven from your houses; for whoever eats anything leavened from the first day until the seventh day, that person shall be cut off from Israel.

Exodus 13:6

For seven days you shall eat unleavened bread, and on the seventh day there shall be a feast to the Lord.

Exodus 23:15

You shall observe the Feast of Unleavened Bread; for seven days you are to eat unleavened bread, as I commanded you, at the appointed time in the month Abib, for in it you came out of Egypt. And none shall appear before Me empty-handed.

Exodus 34:18

“You shall observe the Feast of Unleavened Bread. For seven days you are to eat unleavened bread, as I commanded you, at the appointed time in the month of Abib, for in the month of Abib you came out of Egypt.

Deuteronomy 16:3-8

You shall not eat leavened bread with it; seven days you shall eat with it unleavened bread, the bread of affliction (for you came out of the land of Egypt in haste), so that you may remember all the days of your life the day when you came out of the land of Egypt.

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
Seven days you shall eat unleavened bread, but on the first day you shall remove leaven from your houses; for whoever eats anything leavened from the first day until the seventh day, that person shall be cut off from Israel.
Exodus 13:6
For seven days you shall eat unleavened bread, and on the seventh day there shall be a feast to the Lord.
Leviticus 23:6
Then on the fifteenth day of the same month there is the Feast of Unleavened Bread to the Lord; for seven days you shall eat unleavened bread.