2 Chronicles 7:9
On the day after the festival ended, they convened a solemn assembly, because they had been dedicating the altar for seven days and observing the festival for seven days.
Leviticus 23:36
For seven days, bring offerings made by fire to the LORD. The eighth day is also to be a sacred assembly for you. Bring offerings made by fire to the LORD. It's a sacred assembly. You are not to do any servile work.
Deuteronomy 16:8
Eat bread without yeast for six days. Then on the seventh day, hold an assembly to the LORD your God. Don't do any work."
1 Kings 8:65
So Solomon observed the Festival of Tents at that time, as did all of Israel with him. A large assembly came up from as far away as Lebo-hamath and the Wadi of Egypt to appear in the presence of the LORD our God, not just for seven days, but for seven days after that, a total of fourteen days.
2 Chronicles 30:23
After this, the whole assembly agreed to celebrate for another seven days, and so they did and they were very happy to do so!
Nehemiah 8:18
and Ezra continued to read from the Book of the Law of God day by day, from the first day through the last. They celebrated for seven days, and on the eighth day they held a solemn assembly according to regulation.
Joel 1:14
Set apart time for a fast! Call a solemn assembly! Gather the elders and everyone living in the land to the Temple of the LORD your God, and cry out to the LORD!"