Gregory the Great — as excerpted in the Catena Aurea on Luke 16:27-31

“(ubi sup.) But soon the rich man is answered in the words of truth; for it follows, And he said unto him, If they hear not, Moses and the prophets, neither will they believe though one rose from the dead. For they who despise the words of the Law, will find the commands of their Redeemer who rose from the dead, as they are more sublime, so much the more difficult to fulfil.”