Exodus 12:15-16

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.

12:16 On the first day there will be a holy convocation, and on the seventh day there will be a holy convocation for you. You must do no work of any kind on them, only what every person will eat – that alone may be prepared for you.

Exodus 13:6-7

13:6 For seven days you must eat bread made without yeast, and on the seventh day there is to be a festival to the Lord. 13:7 Bread made without yeast must be eaten for seven days; no bread made with yeast shall be seen among you, and you must have no yeast among you within any of your borders.

Exodus 34:18

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 28:17-18

28:17 And on the fifteenth day of this month is the festival. For seven days bread made without yeast must be eaten. 28:18 And on the first day there is to be a holy assembly; you must do no ordinary work on it.

Deuteronomy 16:8

16:8 You must eat bread made without yeast for six days. The seventh day you are to hold an assembly for the Lord your God; you must not do any work on that day.

Acts 12:3-4

12:3 When he saw that this pleased the Jews, he proceeded to arrest Peter too. (This took place during the feast of Unleavened Bread.) 12:4 When he had seized him, he put him in prison, handing him over to four squads of soldiers to guard him. Herod planned to bring him out for public trial after the Passover.