John 7:37-39

Now the last day, that the great day of the feast, Jesus stood up and cried in a loud voice.

Revelation 7:9-17

After this I looked, and behold a great multitude, whom no man could number, out of every nation and tribe and people and tongue, standing before the throne and before the Lamb, clothed in white robes, with palm branches in their hands;

Treasury of Scripture Knowledge

Summary

On the eighth day ye shall have a solemn assembly: ye shall do no servile work therein:

Bible References

Eighth day

John 7:37
Now the last day, that the great day of the feast, Jesus stood up and cried in a loud voice.
Revelation 7:9
After this I looked, and behold a great multitude, whom no man could number, out of every nation and tribe and people and tongue, standing before the throne and before the Lamb, clothed in white robes, with palm branches in their hands;