Leviticus 23:34-43
34 “Say to the Israelites: ‘On the fifteenth day of the seventh month the Lord’s Feast of Tabernacles begins, and it lasts for seven days.
35 The first day is a sacred assembly; do no regular work.
36 For seven days present offerings made to the Lord by fire, and on the eighth day hold a sacred assembly and present an offering made to the Lord by fire. It is the closing assembly; do no regular work.
37 (“‘These are the Lord’s appointed feasts, which you are to proclaim as sacred assemblies for bringing offerings made to the Lord by fire—the burnt offerings and grain offerings, sacrifices and drink offerings required for each day.
38 These offerings are in addition to those for the Lord’s Sabbaths and in addition to your gifts and whatever you have vowed and all the freewill offerings you give to the Lord.)
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.
40 On the first day you are to take choice fruit from the trees, and palm fronds, leafy branches and poplars, and rejoice before the Lord your God for seven days.
41 Celebrate this as a festival to the Lord for seven days each year. This is to be a lasting ordinance for the generations to come; celebrate it in the seventh month.
42 Live in booths for seven days: All native-born Israelites are to live in booths
43 so your descendants will know that I had the Israelites live in booths when I brought them out of Egypt. I am the Lord your God.’”