Who were the people involved in the third tongue-speaking event in Acts 19?
The third tongue-speaking event in Acts 19 involved a unique little group, small in number, who were representative of a larger group. The supplied context does not name them further, only distinguishing them from the Jews in Acts 2 and the whole house of Gentiles in the second occurrence.
Les teaches that the third and last tongue-speaking event in the book of Acts occurs in chapter 19. He describes the participants as another unique little group, small in number, but representative of another larger group. This follows the first occurrence to Jews in Acts 2, strictly to the Jew, and the second occurrence to a whole house of Gentiles. The context ends at Acts 19:1, so the specific identity of this group is not given in the supplied unit.
And it came to pass, that, while Apollos was at Corinth, Paul having passed through the upper coasts came to Ephesus: and finding certain disciples,
See the restMore Questions
Which groups in Acts spoke in languages other than their own?
Those three categories are the only ones that came under the manifestation of the power of the Holy Spirit to speak in languages other than the ones in which they normally practiced.
Why didn't the Acts 19 believers need interpreters when they spoke in tongues?
In the third category (the Acts 19 group), there was no need for interpreters and no emotional upheaval; it was simply the working of the Holy Spirit toward the third category of people God would deal with in the Book of Acts.