From the blood of Abel unto the blood of Zachariah, who perished between the altar and the temple: verily I say unto you, It shall be required of this generation.
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George Leo Haydock
Blood of Zacharias This Zacharias was, according to some Zacharias the son of Joiada, whom the Jews slew between the temple and the altar. (Theophylactus,
also St. Jerome, who moreover mentions that some editions had Zacharias, son of Joiada.)
This generation. Not that this generation of the Jews should be punished for the crimes of others, but that having before their eyes the severe chastisements their ancestors had received, in punishment of their wickedness, they had not grown better, but had imitated their perversity. (St. Chrysostom, hom. lxxv. in Matt.)