Leviticus 23:38-43

38beside the sabbaths of the LORD, and beside your gifts, and beside all your vows, and beside all your freewill offerings, which ye give unto the LORD.

39Howbeit on the fifteenth day of the seventh month, when ye have gathered in the fruits of the land, ye shall keep the feast of the LORD seven days: on the first day shall be a solemn rest, and on the eighth day shall be a solemn rest.

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 the LORD your God seven days.

41And ye shall keep it a feast unto the LORD seven days in the year: it is a statute for ever in your generations: ye shall keep it in the seventh month.

42Ye shall dwell in booths seven days; all that are homeborn in Israel shall dwell in booths:

43that your generations may know that I made the children of Israel to dwell in booths, when I brought them out of the land of Egypt: I am the LORD your God.