'Announced' in the Bible

which He announced before through His prophets in holy writings --

who are Israelites, to whom belongs the adoption as sons, the glory (Shekinah), the [special] covenants [with Abraham, Moses, and David], the giving of the Law, the [system of temple] worship, and the [original] promises.

but just as it is written, "[Those] to whom [it was] not announced concerning him will see, and [those] who have not heard will understand."