Nehemiah 8:13-15

13On the second day the heads of fathers' houses of all the people, with the priests and the Levites, came together to Ezra the scribe in order to study the words of the Law.

14And they found it written in the Law that the Lord had commanded by Moses that the people of Israel should dwell in booths during the feast of the seventh month,

15and that they should proclaim it and publish it in all their towns and in Jerusalem, "Go out to the hills and bring branches of olive, wild olive, myrtle, palm, and other leafy trees to make booths, as it is written."