eighth day.

Leviticus 23:36
For seven days you are to present an offering made by fire to the LORD. On the eighth day you are to hold a sacred assembly and present an offering made by fire to the LORD. It is a solemn assembly; you are not to do any regular work.

John 7:37-39
On the last and greatest day of the feast, Jesus stood up and called out in a loud voice, "If anyone is thirsty, let him come to Me and drink. . . .

Revelation 7:9-17
After this I looked and saw a multitude too large to count, from every nation and tribe and people and tongue, standing before the throne and before the Lamb. They were wearing white robes and were holding palm branches in their hands. . . .