Leviticus 23:26

"And Jehovah spake unto Moses, saying, Howbeit on the tenth day of this seventh month is the day of atonement: it shall be a holy convocation unto you, and ye shall afflict your souls; and ye shall offer an offering made by fire unto Jehovah. And ye shall do no manner of work in that same day; for it is a day of atonement, to make atonement for you before Jehovah your God. For whatsoever soul it be that shall not be afflicted in that same day; he shall be cut off from his people. And whatsoever soul it be that doeth any manner of work in that same day, that soul will I destroy from among his people. Ye shall do no manner of work: it is a statute for ever throughout your generations in all your dwellings. It shall be unto you a sabbath of solemn rest, and ye shall afflict your souls: in the ninth day of the month at even, from even unto even, shall ye keep your sabbath."

The Day of Atonement was a high sabbath of the utmost holiness, as attested by the recurring admonition, "no manner of work," thus ranking it with the weekly sabbath in sanctity. For comment on "afflict your souls" see under Leviticus 16:29. Although fasting is not mentioned here, it was, nevertheless, a day of fasting, being, in fact, the only fast day that God commanded Israel to keep. Of course, the abbreviated reference to the Day of Atonement here is due to the fact of its having already been thoroughly detailed in Leviticus 16. Moses' method through the Five Books is that of returning again and again to the same subject, but with full consciousness of the sum total of all that he wrote.

YOM KIPPUR. This Day of Atonement is still honored by the Jews who call it Yom Kippur.