Leviticus 16:29
And shall be a statute for ever unto you: in the seventh month, on the tenth of the month, ye shall afflict your souls, and do no work at all, one of your own country, or a stranger that sojourneth among you:
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Context
27 And the bullock the sin offering, and the goat the sin offering, whose blood was brought in to make atonement in the holy , shall carry forth without the camp; and they shall burn in the fire their skins, and their flesh, and their dung.
28 And he that burneth them shall wash his clothes, and bathe his flesh in water, and afterward he shall come into the camp.
29 And shall be a statute for ever unto you: in the seventh month, on the tenth of the month, ye shall afflict your souls, and do no work at all, one of your own country, or a stranger that sojourneth among you:
30 For on that day shall make an atonement for you, to cleanse you, ye may be clean from all your sins before the Yahuah.
31 It a sabbath of rest unto you, and ye shall afflict your souls, by a statute for ever.