Leviticus 23:33-36

³³And Jehovah spake unto Moses, saying, ³⁴Speak unto the children of Israel, saying, On the fifteenth day of this seventh month is the feast of tabernacles for seven days unto Jehovah. ³⁵On the first day shall be a holy convocation: ye shall do no servile work. ³⁶Seven days ye shall offer an offering made by fire unto Jehovah: on the eighth day shall be a holy convocation unto you; and ye shall offer an offering made by fire unto Jehovah: it is a solemn assembly; ye shall do no servile work.