Mark 13:30

Verily I say unto you, This generation shall mot pass away, until all these things be accomplished.

This generation ... has two meanings. First, it means that group of people alive at any given time on the earth; this first meaning, as should have been expected, applies to the first event of the prophecy of the destruction of the temple and the city, which, right on schedule, occurred while many who were alive when Christ uttered these words were still alive. Second, it means a strain of people, in this case the Jewish people (this understanding of the word going all the way back to Jerome).[45] Logically, this secondary meaning of the word applies to the second event predicted, namely the end of time. So understood, it simply means that the Jewish people shall not perish until the summation of all things, a fact also categorically affirmed by Paul in Romans 11:25. The continued existence of Israel, therefore, despite the avowed efforts of mighty rulers to annihilate that people, is a fulfillment of this prophecy.