Leviticus 23:36-38

Seven days ye shall offer an offering made by fire unto the LORD: on the eighth day shall be an holy convocation unto you; and ye shall offer an offering made by fire unto the LORD: it {is} a solemn assembly; {and} ye shall do no servile work {therein}. {solemn...: Heb. day of restraint} These {are} the feasts of the LORD, which ye shall proclaim {to be} holy convocations, to offer an offering made by fire unto the LORD, a burnt offering, and a meat offering, a sacrifice, and drink offerings, every thing upon his day: Beside the sabbaths of the LORD, and beside your gifts, and beside all your vows, and beside all your freewill offerings, which ye give unto the LORD.