Leviticus 23
40 Ref On the first day, take the fruit of fair trees, branches of palm-trees, and branches of thick trees and trees from the riverside, and be glad before the Lord for seven days.
41 Ref And let this feast be kept before the Lord for seven days in the year: it is a rule for ever from generation to generation; in the seventh month let it be kept.
42 Ref For seven days you will be living in tents; all those who are Israelites by birth are to make tents their living-places:
43 Ref So that future generations may keep in mind how I gave the children of Israel tents as their living-places when I took them out of the land of Egypt: I am the Lord your God.