Numbers 29:35

" 'On the eighth day you will have an assembly; {you will not do any regular work}.

Leviticus 23:36

[For] seven days you must present an offering made by fire to Yahweh. On the eighth day it shall be a holy assembly for you, and you shall present an offering made by fire to Yahweh; it [is] a celebration; you must not do {any regular work}.

John 7:37-39

Now on the last day of the feast--the great [day]--Jesus stood and cried out, saying, "If anyone is thirsty, let him come to me, and let him drink,

Revelation 7:9-17

After these [things] I looked, and behold, a great crowd that no one was able to number, from every nation and tribe and people and language, standing before the throne and before the Lamb, dressed [in] white robes and [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 on the last day of the feast--the great [day]--Jesus stood and cried out, saying, "If anyone is thirsty, let him come to me, and let him drink,
Revelation 7:9
After these [things] I looked, and behold, a great crowd that no one was able to number, from every nation and tribe and people and language, standing before the throne and before the Lamb, dressed [in] white robes and [with] palm branches in their hands.