Numbers 28:17

And in 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 Jehovah. You must eat unleavened bread seven days.

Exodus 12:15-17

You shall eat unleavened bread seven days; even the first day you shall put away leaven out of your houses. For whoever eats leavened bread from the first day until the seventh day, that soul shall be cut off from Israel.

Exodus 13:6

You shall eat unleavened bread seven days, and in the seventh day shall be a feast to Jehovah.

Exodus 23:15

You shall keep the Feast of Unleavened Bread. You shall eat unleavened bread seven days, as I commanded you, in the time appointed of the month Abib, for in it you came out of Egypt. And no one shall appear before Me empty.

Exodus 34:18

You shall keep the Feast of Unleavened Bread. You shall eat unleavened bread seven days, as I commanded you, in the time of the month Abib. For in the month Abib you came out from Egypt.

Deuteronomy 16:3-8

You shall eat no leavened bread with it. Seven days you shall eat unleavened bread with it, the bread of affliction, for you came forth out of the land of Egypt in haste, so that you may remember the day that you came forth out of the land of Egypt all the days of 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
You shall eat unleavened bread seven days; even the first day you shall put away leaven out of your houses. For whoever eats leavened bread from the first day until the seventh day, that soul shall be cut off from Israel.
Exodus 13:6
You shall eat unleavened bread seven days, and in the seventh day shall be a feast to Jehovah.
Leviticus 23:6
and on the fifteenth day of the same month is the Feast of Unleavened Bread to Jehovah. You must eat unleavened bread seven days.