The Feast of Tabernacles is also known as Sukkot, the portable house of worship. During this eight day feast, the Israelites were instructed to dwell in booths or a simply made hut as a reminder of how their ancestors lived when leaving Egypt.
Speak to the children of Israel, saying: The fifteenth day of this seventh month shall be the Feast of Tabernacles for seven days to the LORD. On the first day there shall be a holy convocation. You shall do no customary work on it. For seven days you shall offer an offering made by fire to the LORD. On the eighth day you shall have a holy convocation, and you shall offer an offering made by fire to the LORD. It is a sacred assembly, and you shall do no customary work on it… You shall dwell in booths for seven days. All who are native Israelites shall dwell in booths, that your generations may know that I made the children of Israel dwell in booths when I brought them out of the land of Egypt: I am the LORD your God.
Leviticus 23:34-36; 42,44