Leviticus 23:41-43

41You shall celebrate it as a feast to the Lord for seven days in the year. It shall be a permanent statute throughout your generations; you shall celebrate it in the seventh month.

42You shall live in booths (temporary shelters) for seven days; all native-born in Israel shall live in booths,

43so that your generations may know that I had the sons of Israel live in booths when I brought them out of the land of Egypt. I am the Lord your God.’ ”