Leviticus:23:35-36
nkjv@Leviticus:23:35 @ On the first day there shall be a holy convocation. You shall do no customary work on it.
nkjv@Leviticus:23:36 @ For seven days you shall offer an offering made by fire to the LORD. On the eighth day you shall have a holy convocation, and you shall offer an offering made by fire to the LORD. It is a sacred assembly, and you shall do no customary work on it.