"You shall live in booths for seven days; all the native-born in Israel shall live in booths, so that your generations may know that I had the sons of Israel live in booths when I brought them out from the land of Egypt. I am the LORD your God." (Leviticus 23:42-43) The literal commandment is that we should live in "booths" (temporary structure) for seven days during Sukkot: the Feast of Tabernacles.
"Now on the first day you shall take for yourselves the foliage of beautiful trees, palm branches and boughs of leafy trees and willows of the brook, and you shall rejoice before the LORD your God for seven days." (Leviticus 23:40) The literal commandment is to take the foliage [literally "fruit"] of beautiful trees, palm branches, and boughs of leafy trees and willows and rejoice before G-d for seven days during Sukkot: the Feast of Tabernacles.