Leviticus Chapter 23 Verses 39 - 43
"On the fifteenth day of the seventh new moon (month), when you gather in the fruit of the land, celebrate the Festival of YaHuWaH for seven days. On the first day is a rest, and on the eight day a rest. And you shall take for yourselves on the first day the fruit of good trees, branches of palm trees, twigs of leafy trees, and willows of the stream, and shall rejoice before YaHuWaH your God for seven days. And you shall celebrate it as a festival to YaHuWaH for seven days in the year - a law forever in your generations. Celebrate it in the seventh new moon (month). Dwell in booths for seven days; all who are native born in Yisrael dwell in booths, so that your generations know that I made the children of Yisrael dwell in booths when I brought them out of the land of Mitsrayim (Egypt). I am YaHuWaH your God."