In Exodus 12:15, the same instruction to remove leaven and the penalty of being cut off is given earlier in the chapter.

In Exodus 12:48, a sojourner who is circumcised may keep the Passover, expanding the inclusion implied in the leaven law.

In Exodus 23:15, the command to keep the Feast of Unleavened Bread is repeated, reinforcing the prohibition of leaven.

In Exodus 34:18, the same feast command is reiterated, echoing the removal of leaven.

Exodus 13:7 repeats the command: no leaven seen for seven days — reinforcing the same regulation for the Feast of Unleavened Bread.

Exodus 30:33 uses the same 'cut off' penalty for misusing holy anointing oil — both are serious covenant violations.

In Deuteronomy 16:3, the prohibition on leaven is tied to the 'bread of affliction' and the haste of the Exodus.

In 1 Corinthians 5:7, Paul uses the removal of leaven as a metaphor for cleansing sin, with Christ as the Passover lamb.

In 1 Corinthians 5:8, Paul calls believers to celebrate the festival with sincerity and truth, applying the leaven metaphor.

Genesis 17:14 uses the same 'cut off from his people' penalty for circumcision breach — here applied to eating leaven during the feast.

Leviticus 2:11 also forbids leaven — in grain offerings to the LORD — expanding the prohibition beyond the feast.

In Numbers 9:13, being cut off is the penalty for neglecting the Passover itself, similar to the consequence for eating leaven here.

Leviticus 7:21 imposes the same 'cut off' penalty for eating peace offerings while unclean — both are cultic infractions.

Leviticus 17:4 uses 'cut off' for failing to bring sacrifices — here the same penalty applies to eating leaven at Passover.