On the tenth day of the seventh month the day of atonement was to be observed by a holy meeting, by fasting from the evening of the ninth till the evening of the tenth, by resting from all work on pain of death, and with sacrifices, of which the great expiatory sacrifice peculiar to this day had already been appointed in ch. 16, and the general festal sacrifices are described in Numbers 29:8-11. (For fuller particulars, see at ch. 16.) By the restrictive אך, the observance of the day of atonement is represented a priori as a peculiar one. The אך refers less to "the tenth day," than to the leading directions respecting this feast: "only on the tenth of this seventh month...there shall be a holy meeting to you, and ye shall afflict your souls," etc.

Leviticus 23:35 Parallel Commentaries

Leviticus 23:7,8,24,25 In the first day you shall have an holy convocation: you shall do no servile work therein...