Exodus 12:19
Yeast must not be found in your houses for seven days. If anyone eats something leavened, that person, whether a foreign resident or native of the land, must be cut off from the community of Israel.
Exodus 12:15
You must eat unleavened bread for seven days. On the first day you must remove yeast
Exodus 12:48
If a foreigner resides with you and wants to celebrate the Lord’s Passover, every male in his household must be circumcised, and then he may participate;
Exodus 12:43
The Lord said to Moses and Aaron, “This is the statute of the Passover: no foreigner may eat it.
Exodus 23:15
Observe the Festival of Unleavened Bread. As I commanded you, you are to eat unleavened bread for seven days at the appointed time in the month of Abib,
Exodus 34:18
“Observe the Festival of Unleavened Bread. You are to eat unleavened bread for seven days at the appointed time in the month of Abib
Numbers 9:13
“But the man who is ceremonially clean, is not on a journey, and yet fails to observe the Passover is to be cut off from his people, because he did not present the Lord’s offering at its appointed time. That man will bear the consequences of his sin.
Deuteronomy 16:3
You must not eat leavened bread with it. For seven days you are to eat unleavened bread with it, the bread of hardship—because you left the land of Egypt in a hurry—so that you may remember for the rest of your life the day you left the land of Egypt.
1 Corinthians 5:7-8
Clean out the old yeast so that you may be a new batch. You are indeed unleavened, for Christ our Passover