Leviticus 16:29-31

“This shall be a permanent statute for you: in the seventh month, on the tenth day of the month, you shall humble your souls and not do any work, whether the native, or the alien who sojourns among you; for it is on this day that atonement shall be made for you to cleanse you; you will be clean from all your sins before the LORD. It is to be a sabbath of solemn rest for you, that you may humble your souls; it is a permanent statute.