Numbers 28:17

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

Leviticus 23:6

And on the fifteenth day of the same month is the feast of unleavened bread to the LORD, seven days ye must eat unleavened bread.

Exodus 12:15-17

Seven days shall ye eat unleavened bread; even the first day ye shall put away leaven out of your houses: for whoever eateth leavened bread, from the first day till the seventh day, that soul shall be cut off from Israel.

Exodus 13:6

Seven days shalt thou eat unleavened bread, and in the seventh day shall be a feast to the LORD.

Exodus 23:15

Thou shalt keep the feast of unleavened bread: (thou shalt eat unleavened bread seven days, as I commanded thee, in the time appointed of the month Abib; for in it thou camest out from Egypt: and none shall appear before me empty:)

Exodus 34:18

The feast of unleavened bread shalt thou keep. Seven days shalt thou eat unleavened bread, as I commanded thee, in the time of the month Abib: for in the month Abib thou camest out of from Egypt.

Deuteronomy 16:3-8

Thou shalt eat no leavened bread with it; seven days shalt thou eat unleavened bread with it, even the bread of affliction; for thou camest forth from the land of Egypt in haste: that thou mayest remember the day when thou camest forth from the land of Egypt, all the days of thy 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
Seven days shall ye eat unleavened bread; even the first day ye shall put away leaven out of your houses: for whoever eateth leavened bread, from the first day till the seventh day, that soul shall be cut off from Israel.
Exodus 13:6
Seven days shalt thou eat unleavened bread, and in the seventh day shall be a feast to the LORD.
Leviticus 23:6
And on the fifteenth day of the same month is the feast of unleavened bread to the LORD, seven days ye must eat unleavened bread.