Leviticus 23:3, 8, 21, 25, 35-36

“You have six days each week for your ordinary work, but the seventh day is a Sabbath day of complete rest, an official day for holy assembly. It is the LORD’s Sabbath day, and it must be observed wherever you live.

For seven days you must present special gifts to the LORD. On the seventh day the people must again stop all their ordinary work to observe an official day for holy assembly.”

That same day will be proclaimed an official day for holy assembly, a day on which you do no ordinary work. This is a permanent law for you, and it must be observed from generation to generation wherever you live.

You must do no ordinary work on that day. Instead, you are to present special gifts to the LORD.”

On the first day of the festival you must proclaim an official day for holy assembly, when you do no ordinary work. For seven days you must present special gifts to the LORD. The eighth day is another holy day on which you present your special gifts to the LORD. This will be a solemn occasion, and no ordinary work may be done that day.