Leviticus 23:31-33 New Revised Standard Version, Anglicised Catholic Edition (NRSVACE)
31 You shall do no work: it is a statute for ever throughout your generations in all your settlements. 32 It shall be to you a sabbath of complete rest, and you shall deny yourselves;[a] on the ninth day of the month at evening, from evening to evening you shall keep your sabbath.
The Festival of Booths
33 The Lord spoke to Moses, saying: