*Luke 6:26 Woe unto you, when all men shall speak well of you!

The "speak well of you" is actually "name you noble" but the sense is "flatter you." Our word "flatter" comes from "flat" referring to prostrating oneself before nobility.  This people that do this are not "everyone" or "all men," but "all those people," all of a certain group. The final phrase is here not "false prophets," which is actually the setup, describing the flattery as false and equating his listeners with those whom people falsely called enlightened. The punchline is who did this: the fathers of his listeners. Their fathers are equated with the flatterers while those who are flattered with the false prophets.

One set of false prophets in the Old Testament were those Ezekiel spoke against in Ezekiel 13:2-3.