Leviticus 23:29-33

²⁹For whatsoever soul it be that shall not be afflicted in that same day, he shall be cut off from among his people.

³⁰And whatsoever soul it be that doeth any work in that same day, the same soul will I destroy from among his people.

³¹Ye shall do no manner of work: it shall be a statute for ever throughout your generations in all your dwellings.

³²It shall be unto you a sabbath of rest, and ye shall afflict your souls: in the ninth day of the month at even, from even unto even, shall ye celebrate your sabbath.

³³And the LORD spake unto Moses, saying,