Chapter 30

Now Hezekiah sends letters to those who escaped exile in Samaria, Ephraim, and Manasseh - to all who are outside Judah, but are still Jews by birth - and invites them to come to Jerusalem to observe Passover, though it is a belated one.  He extends friendship and welcome to those who for so long  have opposed Judah, tells them not to be hardheaded about God as their father's were, but to come and worship with Judah.

The messengers were laughed to scorn, mocked, and turned away.  Guess this confirms God's justice in destroying the 10 tribes in the north.

In vss 15-20 we find that many who showed up for the Passover were not ceremonially clean, but they ate the Passover anyway.  Hezekiah prayed to God to overlook this, as to those who "set their hearts to seek God", and God heard this prayer, and healed the people.  So...is this relevant to Baptism?  God will forgive those who diligently seek Him, despite their ceremonial uncleanness - which is kind of what baptism is about.  This might even be the OT type for salvation, and baptism is not strictly required.  This would  need to be included in any survey of baptism and its history.

This was truly a national revival, and it was noted by the God of heaven.  vs 27:

27 Then the priests and the Levites arose and blessed the people, and their voice was heard, and their prayer came to his holy habitation in heaven. [2Ch 30:27 ESV]