9 There was an assembly on the eighth day. They observed the dedication of the altar for seven days and celebrated the festival for another seven days.
2 Chronicles 7:9 Cross References - NSB
Leviticus 23:36
36 »‘Bring a sacrifice by fire to Jehovah for seven consecutive days. On the eighth day there will be a holy assembly. Bring Jehovah a sacrifice by fire. This is the last festival of the year. Do not do any regular work.
Deuteronomy 16:8
8 »Eat unleavened bread for six days. On the seventh day there shall be a solemn assembly to Jehovah your God. Do not do work on it.
1 Kings 8:65
65 At that time Solomon and all Israel celebrated the festival. A large crowd had come from the territory between the border of Hamath and the River of Egypt to be near Jehovah our God for seven days.
2 Chronicles 30:23
23 Then the whole assembly decided to celebrate the festival for seven more days. So they joyfully celebrated for seven more days.
Nehemiah 8:18
18 Day by day, from the first day till the last, he read from the book of the Law of God. They kept the feast for seven days: and on the eighth day there was a holy meeting, as it is ordered in the law.
Joel 1:14
14 »Sanctify a fast! Call a solemn assembly. Gather the elders and all the inhabitants of the land to the House of Jehovah your God. Call out to Jehovah.