2 Timothy 3
1This know also, that in the last days perilous times shall come.
2For men shall be lovers of their own selves, covetous, boasters, proud, blasphemers, disobedient to parents, unthankful, unholy,
3Without natural affection, trucebreakers, false accusers, incontinent, fierce, despisers of those that are good,
4Traitors, heady, highminded, lovers of pleasures more than lovers of God;
5Having a form of godliness, but denying the power thereof: from such turn away.
6For of this sort are they which creep into houses, and lead captive silly women laden with sins, led away with divers lusts,
7Ever learning, and never able to come to the knowledge of the truth.
8Now as Jannes and Jambres withstood Moses, so do these also resist the truth: men of corrupt minds, reprobate concerning the faith.
9But they shall proceed no further: for their folly shall be manifest unto all men, as their's also was.
10But thou hast fully known my doctrine, manner of life, purpose, faith, longsuffering, charity, patience,
11Persecutions, afflictions, which came unto me at Antioch, at Iconium, at Lystra; what persecutions I endured: but out of them all the Lord delivered me.
12Yea, and all that will live godly in Christ Jesus shall suffer persecution.
13But evil men and seducers shall wax worse and worse, deceiving, and being deceived.
14But continue thou in the things which thou hast learned and hast been assured of, knowing of whom thou hast learned them;
The classic biblicist rub with modern pentecostals is that it's an unmonitored phenomenon (nobody is translating) and that the sign function (witness to unbelievers who speak that tongue) seems to be little used if not totally absent. That runs afoul of the canons that St. Paul, for good reason, established. I've heard a horror story of a group of pentecostals having at it in an actual foreign language (Polish) while responding with "bless the Lord" in English, and somebody walked in who knew Polish and was aghast to hear that they weren't blessing God in Polish but cursing Him. That's why this kind of stuff really shouldn't go unmonitored.