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.
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.
Numbers 29:35
"On the eighth day, you are to call a sacred assembly. No servile work is to be done.
Deuteronomy 31:10-13
Then he gave these orders: "At the end of seven years, the year designated for release, during the Festival of Tents,
John 7:37
On the last and most important day of the festival, Jesus stood up and shouted, "If anyone is thirsty, let him come to me and drink!