Nehemiah 8:13-15

13And on the second day were gathered together the chief fathers of all the people, the priests, and the Levites, to Ezra the scribe, even to gain wisdom as to the words of the law.

14And they found written in the law which Jehovah had commanded through Moses, that the children of Israel should dwell in booths in the feast of the seventh month,

15and that they should publish and proclaim through all their cities, and at Jerusalem, saying, Go forth to the mount, and fetch olive-branches, and wild olive-branches, and myrtle-branches, and palm-branches, and branches of thick trees, to make booths, as it is written.