Yom Kippur (Day of Atonement)

Leviticus 23:27 On the tenth day of this seventh month is the day of atonement: it shall be a holy convocation to you, and you shall afflict your souls; and you shall offer an offering made by fire to Yahweh. 28 And you shall do no manner of work in that same day; for it is a day of atonement...