Leviticus 23:37-39

23:37 “‘These are the appointed times of the Lord that you must proclaim as holy assemblies to present a gift to the Lord – burnt offering, grain offering, sacrifice, and drink offerings, each day according to its regulation, 23:38 besides the Sabbaths of the Lord and all your gifts, votive offerings, and freewill offerings which you must give to the Lord.

23:39 “‘On the fifteenth day of the seventh month, when you gather in the produce of the land, you must celebrate a pilgrim festival of the Lord for seven days. On the first day is a complete rest and on the eighth day is complete rest.