John Gill Commentary 2 Chronicles 30:11

"Nevertheless certain men of Asher and Manasseh and of Zebulun humbled themselves, and came to Jerusalem." — 2 Chronicles 30:11 (ASV)

Nevertheless, divers of Asher, and Manasseh, and of Zebulun,
humbled themselves
Confessed their idolatries and impieties, and expressed sorrow and repentance for them, and were willing to obey the commands of God, and attend his worship and ordinances:

and came to Jerusalem ;
to keep the passover.