Leviticus 23:35

31 You are not to do any work at all. This is a permanent statute for the generations to come, wherever you live.

32 It will be a Sabbath of complete rest for you, and you shall humble yourselves. From the evening of the ninth day of the month until the following evening you are to keep your Sabbath.”

33 And the LORD said to Moses,

34 “Speak to the Israelites and say, ‘On the fifteenth day of the seventh month the Feast of Tabernacles to the LORD begins, and it continues for seven days.

35 On the first day there shall be a sacred assembly. You must not do any regular work.

36 For seven days you are to present an offering made by fire to the LORD. On the eighth day you are to hold a sacred assembly and present an offering made by fire to the LORD. It is a solemn assembly; you must not do any regular work.

37 These are the LORD’s appointed feasts, which you are to proclaim as sacred assemblies for presenting offerings by fire to the LORD—burnt offerings and grain offerings, sacrifices and drink offerings, each on its designated day.

38 These offerings are in addition to the offerings for the LORD’s Sabbaths, and in addition to your gifts, to all your vow offerings, and to all the freewill offerings you give to the LORD.

39 On the fifteenth day of the seventh month, after you have gathered the produce of the land, you are to celebrate a feast to the LORD for seven days. There shall be complete rest on the first day and also on the eighth day.

Read all of Leviticus 23