Exodus 12:19
For seven days yeast must not be found in your houses, for whoever eats what is made with yeast -- that person will be cut off from the community of Israel, whether a foreigner or one born in the land.
Exodus 12:15
For seven days you must eat bread made without yeast. Surely on the first day you must put away yeast from your houses because anyone who eats bread made with yeast from the first day to the seventh day will be cut off from Israel.
Exodus 12:48
"When a foreigner lives with you and wants to observe the Passover to the Lord, all his males must be circumcised, and then he may approach and observe it, and he will be like one who is born in the land -- but no uncircumcised person may eat of it.
Exodus 12:43
The Lord said to Moses and Aaron, "This is the ordinance of the Passover. No foreigner may share in eating it.
Exodus 23:15
You are to observe the Feast of Unleavened Bread; seven days you must eat bread made without yeast, as I commanded you, at the appointed time of the month of Abib, for at that time you came out of Egypt. No one may appear before me empty-handed.
Exodus 34:18
"You must keep the Feast of Unleavened Bread. For seven days you must eat bread made without yeast, as I commanded you; do this at the appointed time of the month Abib, for in the month Abib you came out of Egypt.
Numbers 9:13
But the man who is ceremonially clean, and was not on a journey, and fails to keep the Passover, that person must be cut off from his people. Because he did not bring the Lord's offering at its appointed time, that man must bear his sin.
Deuteronomy 16:3
You must not eat any yeast with it; for seven days you must eat bread made without yeast, symbolic of affliction, for you came out of Egypt hurriedly. You must do this so you will remember for the rest of your life the day you came out of the land of Egypt.
1 Corinthians 5:7-8
Clean out the old yeast so that you may be a new batch of dough -- you are, in fact, without yeast. For Christ, our Passover lamb, has been sacrificed.