2 Chronicles 30:21-23 describes Hezekiah's seven-day Passover and extra seven—parallel to Josiah's seven-day feast of Unleavened Bread.

Exodus 12:15-20 commands seven days of Unleavened Bread—Josiah's celebration directly obeys this law.

Exodus 13:6 commands eating unleavened bread seven days—Josiah's feast fulfills this specific law.

In Exodus 13:7, the law commands eating unleavened bread for seven days and removing leaven—this observance follows that instruction.

Exodus 23:15 gives the command to keep the Feast of Unleavened Bread for seven days in the month Abib—the same feast kept here.

Exodus 34:18 repeats the command to keep the Feast of Unleavened Bread for seven days in Abib—this narrative records its fulfillment.

Leviticus 23:5-8 prescribes Passover on the 14th day followed by seven days of unleavened bread—the exact pattern observed here.

Numbers 28:16-25 details the offerings for Passover and the seven-day Feast of Unleavened Bread—this observance matches that legislation.

Deuteronomy 16:3 calls unleavened bread 'the bread of affliction' linking the feast to the haste of the Exodus—the same feast remembered here.

Deuteronomy 16:4 forbids leaven in all territory for seven days and leftover sacrificial meat overnight—regulations this Passover kept.

Deuteronomy 16:8 commands a solemn assembly on the seventh day—this celebration included that conclusion to the feast.

1 Corinthians 5:7 identifies Christ as our Passover lamb and calls for purging leaven (sin)—a NT typological fulfillment of the feast kept here.

1 Corinthians 5:8 urges keeping the feast with sincerity and truth, not malice—the spiritual reality behind the literal observance here.

In Ezra 6:22, the returned exiles keep the Feast of Unleavened Bread with joy, mirroring Josiah's Passover celebration.