Leviticus 23:30-32

Young's Literal Translation

³⁰ and any person who doth any work in this self-same day I have even destroyed that person from the midst of his people;

³¹ ye do no work -- a statute age-during to your generations in all your dwellings.

³² It [is] a sabbath of rest to you, and ye have humbled yourselves in the ninth of the month at even; from evening till evening ye do keep your sabbath.'