Leviticus 23:33-36 - The Feast Of Booths
33 And the LORD spake unto Moses, saying, 34 "Speak unto the children of Israel, and say, 'The fifteenth day of the same seventh month shall be the feast of tabernacles, seven days unto the LORD. 35 The first day shall be a holy feast, so that ye shall do no laborious work therein. 36 Seven days ye shall offer sacrifice unto the LORD, and the eighth day shall be a holy feast unto you, and ye shall offer sacrifice unto the LORD. It is the end of the feast, and ye shall do no laborious work therein.