Matthew 23:36

Amen, I say to you. More severe punishments were inflicted on these Jews, on account of their more grievous and heinous transgressions; for nothing had been able to recall them from their wickedness. They had the example of their ancestors before their eyes, continually irritating the wrath of God; yet all they had suffered for their crimes, could not incite them to leave their sinful ways; but they proceeded further than their ancestors in impiety, and ought therefore to receive a more severe condemnation. Thus though Lamech had not killed a brother, but had neglected to be more prudent after the exemplary punishment of Cain, he still cried out: Seven-fold punishment is taken of Cain, but of Lemech seventy times seven. (Genesis iv.) (St. John Chrysostom, hom. lxxiii.)