Jeremiah 50:36

He repeats the same thing, but in other words; and in the first clause he mentions diviners whom he before called wise men; and he calls them now by their true and proper name; for בדים, bedim, mean mendacious men as well as falsehoods. He then calls those now impostors to whom he conceded before the name of wise men. But when he called them wise men, he spoke according to the common opinion, and he was unwilling to contend with the Chaldeans as to the character of their wisdom: he, however, at the same time made known the impositions of those who boasted that they had a familiar intercourse with God and angels, whilst they pronounced by the stars what was to be. That art itself is indeed worthy of praise, were men to preserve moderation. But as the curiosity of men is insatiable, so they wandered here and there, and overleaped all limits, and thus perverted the whole order of nature. The Chaldeans, then, were not genuine, but, on the contrary, spurious astrologers.

This is the reason why the Prophet calls them now liars; for we have before seen, that it was a mere imposition, when the Chaldeans held that the whole life of man is subject to the influence of the stars. Hence he exhorted the faithful to fear no dangers from the stars. It is then no wonder that the Prophet now charges all the diviners with falsehoods, who yet proudly arrogated to themselves the name of wise men, they shall be infatuated, he says. The verb יאל, ial, means indeed to begin, but in Niphal it means to become foolish, or to be infatuated.