Leviticus 23:33-36 - The Feast Of Booths
33 And the Lord said to Moses, 34 Say to the children of Israel, On the fifteenth day of this seventh month let the feast of tents be kept to the Lord for seven days. 35 On the first day there will be a holy meeting: do no field-work. 36 Every day for seven days give an offering made by fire to the Lord; and on the eighth day there is to be a holy meeting, when you are to give an offering made by fire to the Lord; this is a special holy day: you may do no field-work on that day