Leviticus 23:31-41

31 Don't do any work. It is a permanent law for generations to come wherever you live.
32 It is a day of worship, a day when you don't work. Humble yourselves starting on the evening of the ninth day of the month. From that evening to the next, observe the day of worship."
33 The LORD spoke to Moses,
34 "Tell the Israelites: The fifteenth day of this seventh month is the Festival of Booths to the LORD. It will last seven days.
35 On the first day there will be a holy assembly. Don't do any regular work.
36 For seven consecutive days bring a sacrifice by fire to the LORD. On the eighth day there will be a holy assembly. Bring the LORD a sacrifice by fire. This is the last festival of the year. Don't do any regular work
37 "These are the LORD's appointed festivals. Announce them as holy assemblies for bringing sacrifices by fire to the LORD. Bring burnt offerings, grain offerings, other sacrifices, and wine offerings--each one on its special day.
38 This is in addition to the LORD's days of worship, your gifts, all your vows, and your freewill offerings to the LORD
39 "However, on the fifteenth day of the seventh month, when you have gathered what the land produces, celebrate the LORD's festival for seven days. The first and the eighth days will be worship festivals.
40 On the first day take the best fruits, palm branches, the branches of leafy trees and poplars, and celebrate in the presence of the LORD your God for seven days.
41 It is the LORD's festival. Celebrate it for seven days each year. This is a permanent law for generations to come. Celebrate this festival in the seventh month.