Leviticus 16:30-32 New King James Version (NKJV)

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.

31. It is a sabbath of solemn rest for you, and you shall afflict your souls. It is a statute forever.

32. And the priest, who is anointed and consecrated to minister as priest in his father’s place, shall make atonement, and put on the linen clothes, the holy garments;

Leviticus 16