Leviticus 16:29-31

“This is to be a lasting ordinance for you: On the tenth day of the seventh month you must deny yourselves and not do any work—whether native-born or a foreigner residing among you— because on this day atonement will be made for you, to cleanse you. Then, before the LORD, you will be clean from all your sins. It is a day of sabbath rest, and you must deny yourselves; it is a lasting ordinance.