Leviticus 23:8

but you shall offer a fire offering to Jehovah seven days. In the seventh day is a holy convocation. You shall do no work of labor.

Treasury of Scripture Knowledge

Summary

But ye shall offer an offering made by fire unto the LORD seven days: in the seventh day is an holy convocation: ye shall do no servile work therein.

Bible References

General references

Exodus 13:6
You shall eat unleavened bread seven days, and in the seventh day shall be a feast to Jehovah.
Leviticus 23:35
On the first day shall be a holy convocation. You shall do no work of labor.
Numbers 28:16
And in the fourteenth day of the first month is the Passover of Jehovah.