Acts 19:6

And when Paul had laid his hands upon them
They having been before baptized, not by him, but by John, or one of his disciples, in the name of the Lord Jesus; just as Peter and John laid their hands upon the believing Samaritans, who had been before baptized by Philip, ( Acts 8:14-17 ) and the same extraordinary effects followed:

the Holy Ghost came on them;
in his extraordinary gifts, whose special grace they had before an experience of:

and they spake with tongues;
with other tongues, or in other languages, which they had never learned, or had been used to, as the disciples did at the day of "Pentecost": and prophesied; preached, having an extraordinary gift at once, of explaining the prophecies of the Old Testament, and also foretold things to come.