The Church Age Order

We’ve been studying The Outpouring of the gift of holy spirit which is recorded
in Acts 2:1-4. These four verses contain the first account that Christians spoke
in tongues. We’ll study this in depth in this Artios; there are four more verifiable biblical accounts that Christians spoke in tongues. Starting with verse five, even more detail is provided about what happened on this day of Pentecost.
That the gift of holy spirit was outpoured isn’t at question, but what biblical
evidence do we rely on regarding this event?