Exodus 12:8 commands eating unleavened bread with the Passover sacrifice, directly fulfilling the prohibition of leaven with the blood.

In Exodus 12:10, the Passover lamb must not be left until morning — a specific instance of not leaving sacrificial fat overnight.

Exodus 12:15 expands the no-leaven rule to seven days of Unleavened Bread, providing the context for the prohibition here.

In Exodus 34:25, the same prohibition against leaven with sacrifice and leaving fat overnight is repeated, now explicitly tied to the Passover.

In Leviticus 2:11, leaven is forbidden in all grain offerings, extending the rule from sacrificial blood to all offerings.

In Leviticus 7:12, thanksgiving offerings require unleavened cakes, reinforcing the exclusion of leaven from sacrifices.

In Leviticus 7:15, peace offerings for thanksgiving must be eaten the same day, aligning with the command not to leave fat until morning.

In Deuteronomy 16:4, both prohibitions (no leaven, no leftover overnight) are reiterated for the Passover feast.