Leviticus 23:35-37

Amplified Bible

³⁵ The first day is a holy convocation (calling together); you shall not do any laborious work [on that day]. ³⁶ 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].

³⁷ ‘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.