Leviticus 16
29 Ref And let this be an order to you for ever: in the seventh month, on the tenth day, you are to keep yourselves from pleasure and do no sort of work, those who are Israelites by birth and those from other lands who are living among you:
30 Ref For on this day your sin will be taken away and you will be clean: you will be made free from all your sins before the Lord.