In 2 Chronicles 30:15-17, Hezekiah's Passover also involves Levites slaughtering lambs and sanctifying themselves — a direct parallel to Josiah's command here.

2 Chronicles 29:34 notes Levites were more diligent in sanctifying themselves than priests — illustrating the importance of the consecration Josiah commands.

2 Chronicles 30:3 shows Hezekiah's Passover delayed because priests lacked sanctification — explaining why Josiah emphasizes it here.

In 2 Chronicles 29:5, Hezekiah commands Levites to sanctify themselves for temple cleansing — similar sanctification call but different purpose.

2 Chronicles 29:15 shows Levites sanctifying themselves to cleanse the temple, paralleling the consecration required here for Passover.

Exodus 12:6 gives the original command to slaughter the Passover lamb at twilight — the law Josiah is following here.

Exodus 12:21 records Moses instructing elders to kill the Passover lamb — the same command Josiah repeats to the Levites.

In Exodus 19:10, God instructs Moses to consecrate the people and wash garments before meeting Him at Sinai — a direct parallel to the consecration command for Passover.

Ezra 6:20 depicts post-exilic Levites slaughtering Passover lambs after purifying themselves, echoing Josiah's command here.

Joel 2:16 calls to 'consecrate the congregation' for a solemn assembly — a prophetic parallel to the consecration for Passover, emphasizing corporate holiness.

Hebrews 9:14 contrasts the limited OT consecration (v.13) with Christ's blood purifying the conscience — showing the greater reality behind the ritual.

Numbers 19:11-20 details purification from corpse uncleanness, which would prevent participation in Passover — showing why consecration is needed.

In Genesis 35:2, Jacob commands his household to put away foreign gods and purify themselves before building an altar — a parallel call to consecrate before worship.

In 1 Chronicles 15:12, David also commands Levites to sanctify themselves for a sacred task — Josiah gives the same instruction for Passover.

Hebrews 9:13 acknowledges that OT sacrifices (like Passover offerings) sanctified externally — reflecting the purpose behind the consecration command in the old covenant.