Leviticus 23:33-44

Again the LORD spoke to Moses, saying, “Say to the children of Israel, ‘On the fifteenth day of this seventh month, and for seven days, is the Feast of Booths (Tabernacles) to the LORD. The first day is a holy convocation (calling together); you shall not do any laborious work [on that day]. For seven days you shall present an offering by fire to the LORD. On the eighth day you shall have a holy convocation and present an offering by fire to the LORD. It is a festive assembly; you shall not do any laborious work [on that day]. ‘These are the appointed times (established feasts) of the LORD, which you shall proclaim to be holy convocations, to present an offering by fire to the LORD, a burnt offering and a grain offering, sacrifices and drink offerings, each on its own day. This is in addition to the [weekly] Sabbaths of the LORD, and in addition to your gifts and all your vowed offerings and all your freewill offerings, which you give to the LORD. ‘On exactly the fifteenth day of the seventh month (nearly October), when you have gathered in the crops of the land, you shall celebrate the feast of the LORD for seven days, with a Sabbath rest on the first day and a Sabbath rest on the eighth day. Now on the first day you shall take for yourselves the foliage of beautiful trees, branches of palm trees, and boughs of thick (leafy) trees, and willows of the brook [and make booths of them]; and you shall rejoice before the LORD your God for seven days. You shall celebrate it as a feast to the LORD for seven days in the year. It shall be a permanent statute throughout your generations; you shall celebrate it in the seventh month. You shall live in booths (temporary shelters) for seven days; all native-born in Israel shall live in booths, so that your generations may know that I had the sons of Israel live in booths when I brought them out of the land of Egypt. I am the LORD your God.’ ” So Moses declared to the Israelites the appointed feasts of the LORD.