Leviticus 23:21

21 On that same day you are to proclaim a sacred assembly and do no regular work. This is to be a lasting ordinance for the generations to come, wherever you live.

Read Leviticus 23:21 Using Other Translations

And ye shall proclaim on the selfsame day, that it may be an holy convocation unto you: ye shall do no servile work therein: it shall be a statute for ever in all your dwellings throughout your generations.
And you shall make proclamation on the same day. You shall hold a holy convocation. You shall not do any ordinary work. It is a statute forever in all your dwelling places throughout your generations
That same day will be proclaimed an official day for holy assembly, a day on which you do no ordinary work. This is a permanent law for you, and it must be observed from generation to generation wherever you live.