For on that day the priest shall make atonement for you, to cleanse you, that you may be clean from all your sins before the LORD.
Leviticus 16:30
Surrounding context
16:29 "This shall be a statute forever for you: In the seventh month, on the tenth day of the month, you shall afflict your souls, and do no work at all, whether a native of your own country or a stranger who dwells among you.
16:30 For on that day the priest shall make atonement for you, to cleanse you, that you may be clean from all your sins before the LORD.
16:31 It is a sabbath of solemn rest for you, and you shall afflict your souls. It is a statute forever.