Leviticus 23:39 (KJV)
Also in the fifteenth day of the seventh month when ye have gathered in the fruit of the land ye shall keep a feast unto the LORD seven days on the first day shall be a sabbath and on the eighth day shall be a sabbath
Also in the fifteenth day of the seventh month when ye have gathered in the fruit of the land ye shall keep a feast unto the LORD seven days on the first day shall be a sabbath and on the eighth day shall be a sabbath