Leviticus 23:35 (King James Version)
35 On the first day shall be an holy convocation: ye shall do no servile work therein.
Leviticus 23:36 (King James Version)
36 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.