Leviticus 16:31

29“It shall be a statute to you forever: in the seventh month, on the tenth day of the month, you shall afflict your souls, and shall do no kind of work, whether native-born or a stranger who lives as a foreigner among you;

30for on this day shall atonement be made for you, to cleanse you. You shall be clean from all your sins before the LORD.

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

32The priest, who is anointed and who is consecrated to be priest in his father’s place, shall make the atonement, and shall put on the linen garments, even the holy garments.

33Then he shall make atonement for the Holy Sanctuary; and he shall make atonement for the Tent of Meeting and for the altar; and he shall make atonement for the priests and for all the people of the assembly.