Leviticus 23:40-42

40And ye shall take you on the first day the fruit of goodly trees, branches of palm-trees, and boughs of thick trees, and willows of the brook; and ye shall rejoice before Jehovah your God seven days. 41And ye shall keep it a feast unto Jehovah seven days in the year: it is a statute for ever throughout your generations; ye shall keep it in the seventh month. 42Ye shall dwell in booths seven days; all that are home-born in Israel shall dwell in booths;