Leviticus 23:39-43

‘ “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. On the first day you are to take branches from luxuriant trees – from palms, willows and other leafy trees – and rejoice before the LORD your God for seven days. 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. Live in temporary shelters for seven days: all native-born Israelites are to live in such shelters so that your descendants will know that I made the Israelites live in temporary shelters when I brought them out of Egypt. I am the LORD your God.” ’