Bring no more vain oblations; incense is an abomination unto me; the new moons and sabbaths, the calling of assemblies, I cannot away with; it is iniquity, even the solemn meeting. The new moons and Sabbaths "The fast and the day of restraint" - און ועצרה aven vaatsarah. These words are rendered in many different manners by different interpreters, to a good and probable sense by all; but I think by none in such a sense as can arise from the phrase itself, agreeably to the idiom of the Hebrew language. Instead of און aven, the Septuagint manifestly read צום tsom, νηστειαν, "the fast." This Houbigant has adopted. The prophet could not well have omitted the fast in the enumeration of their solemnities, nor the abuse of it among the instances of their hypocrisy, which he has treated at large with such force and elegance in his fifty-eighth chapter. Observe, also, that the prophet Joel, (Joel 1:14, and Joel 2:15), twice joins together the fast and the day of restraint: -
עצרה קראו צום קדשו atsarah kiru tsom kaddeshu
"Sanctify a fast; proclaim a day of restraint:"
which shows how properly they are here joined together. עצרה atsarah, "the restraint," is rendered, both here and in other places of our English translation, "the solemn assembly." Certain holy days ordained by the law were distinguished by a particular charge that "no servile work should be done therein;" Leviticus 23:36; Numbers 29:35; Deuteronomy 16:8. This circumstance clearly explains the reason of the name, the restraint, or the day of restraint, given to those days.
If I could approve of any translation of these two words which I have met with, it should be that of the Spanish version of the Old Testament, made for the use of the Spanish Jews: Tortura y detenimento, "it is a pain and a constraint unto me." But I still think that the reading of the Septuagint is more probably the truth.