Exodus 12:19 repeats the command to remove leaven for seven days, adding the penalty of being cut off from Israel.

Exodus 12:8 specifies eating unleavened bread with the Passover lamb, establishing the practice reiterated in 13:7.

Exodus 12:15 gives the same seven-day unleavened bread command, including the removal on the first day and penalty.

Exodus 23:15 reiterates the Feast of Unleavened Bread for seven days, linking it to the Exodus from Egypt.

Exodus 34:18 repeats the seven-day feast command, emphasizing the appointed time in the month Abib.

Leviticus 23:6 formally institutes the Feast of Unleavened Bread in the sacred calendar, confirming the seven-day observance.

Deuteronomy 16:3 repeats the seven-day unleavened bread command, calling it 'bread of affliction' to remember the haste of the exodus.

Deuteronomy 16:4 reiterates the no-leaven rule and adds a prohibition on leftover sacrificial meat overnight.

Deuteronomy 16:8 adds a holy convocation on the seventh day of unleavened bread, expanding the feast instructions.

Joshua 5:11 shows the command fulfilled: Israelites ate unleavened cakes after entering the Promised Land.

2 Chronicles 35:17 records Josiah's observance of the seven-day Feast of Unleavened Bread, following the command.

Ezra 6:22 describes the post-exilic celebration of the seven-day Feast of Unleavened Bread with joy.

Acts 20:6 notes Paul traveled after the Feast of Unleavened Bread, showing early Christian observance of the festival timing.

1 Corinthians 5:7 uses leaven as a metaphor for sin, urging purity because Christ our Passover has been sacrificed.