Leviticus 23:35-37

35On the first day of the festival you must proclaim an official day for holy assembly, when you do no ordinary work.

36For 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.

37(“These are the Lord’s appointed festivals. Celebrate them each year as official days for holy assembly by presenting special gifts to the Lord—burnt offerings, grain offerings, sacrifices, and liquid offerings—each on its proper day.