And this shall be to you a law for all time: In the seventh month, on the tenth day of the month, you shall practice self-denial; and you shall do no manner of work, neither the citizen nor the alien who resides among you. 30 For on this day atonement shall be made for you to cleanse you of all your sins; you shall be clean before the LORD. 31 It shall be a sabbath of complete rest for you, and you shall practice self-denial; it is a law for all time.
Leviticus 16:29-31