23 The whole assembly then agreed to celebrate the festival seven more days; so for another seven days they celebrated joyfully.

Read 2 Chronicles 30:23 Using Other Translations

And the whole assembly took counsel to keep other seven days: and they kept other seven days with gladness.
Then the whole assembly agreed together to keep the feast for another seven days. So they kept it for another seven days with gladness.
The entire assembly then decided to continue the festival another seven days, so they celebrated joyfully for another week.