luke 11:50 That the blood of all the prophets, which was shed from the foundation of the world, may be required of this generation; - Free Bible Online

      50. all . . . required of this generation--As it was only in the last generation of them that "the iniquity of the Amorites was full" (Ge 15:16), and then the abominations of ages were at once completely and awfully avenged, so the iniquity of Israel was allowed to accumulate from age to age till in that generation it came to the full, and the whole collected vengeance of Heaven broke at once over its devoted head. In the first French Revolution the same awful principle was exemplified, and Christendom has not done with it yet.
      prophets--in the New Testament sense (Mt 23:34; see 1Co 12:28).

JFB.