Leviticus 23:39

On the fifteenth day of the seventh month , when you have gathered in the produce of the land , you shall celebrate the feast of the Lord seven days . On the first day shall be a solemn rest , and on the eighth day shall be a solemn rest .

“‘So beginning with the fifteenth day of the seventh month, after you have gathered the crops of the land, celebrate the festival to the Lord for seven days; the first day is a day of sabbath rest, and the eighth day also is a day of sabbath rest.

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.