Numbers 29:35

And on the eighth day, a closing feast shall there be unto you, no laborious work, shall ye do;

Leviticus 23:36

Seven days, shall ye bring near an altar-flame unto Yahweh: on the eighth day - a holy convocation, shall there be unto you so shall ye bring near an altar-flame unto Yahweh - the closing of the feast, it is, no laborious work, shall ye do.

John 7:37-39

Now, on the last - the great - day of the feast, Jesus was standing, and he cried aloud, saying - If any man thirst, let him come unto me and drink:

Revelation 7:9-17

After these things, I saw, and 1o! a great multitude, - which, to number it! no one was able, - of every nation, and of all tribes, and peoples, and tongues; standing before the throne, and before the Lamb; arrayed in white robes, and 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, on the last - the great - day of the feast, Jesus was standing, and he cried aloud, saying - If any man thirst, let him come unto me and drink:
Revelation 7:9
After these things, I saw, and 1o! a great multitude, - which, to number it! no one was able, - of every nation, and of all tribes, and peoples, and tongues; standing before the throne, and before the Lamb; arrayed in white robes, and palm-branches in their hands; -