It is a sabbath of solemn rest for you, and you shall afflict your souls. It is a statute forever.
Leviticus 16:31
Surrounding context
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.
16:32 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;