Leviticus 23:27; Leviticus 23:39

27 "The tenth day of this seventh month is the Day of Atonement. Hold a sacred assembly and deny yourselves, and present an offering made to the LORD by fire.
39 " '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 rest, and the eighth day also is a day of rest.