I see this important information in Act Chapter 2.

I Just wonder why some religious leaders delude people with speaking in tongue

1 Now while the day of the [festival of] Pentecost was in progress they were all together at the same place, 2 and suddenly there occurred from heaven a noise just like that of a rushing stiff breeze, and it filled the whole house in which they were sitting. 3 And tongues as if of fire became visible to them and were distributed about, and one sat upon each one of them,4 and they all became filled with holy spirit and started to speak with different tongues, just as the spirit was granting them to make utterance.

5 As it was, there were dwelling in Jerusalem Jews, reverent men, from every nation of those under heaven. 6 So, when this sound occurred, the multitude came together and were bewildered, because each one heard them speaking in his own language. 7 Indeed, they were astonished and began to wonder and say: “See here, all these who are speaking are Gal‧i‧le′ans, are they not? 8 And yet how is it we are hearing, each one of us, his own language in which we were born? 9 Par′thi‧ans and Medes and E′lam‧ites, and the inhabitants of Mes‧o‧po‧ta′mi‧a, and Ju‧de′a and Cap‧pa‧do′ci‧a, Pon′tus and the [district of] Asia, 10 and Phryg′i‧a and Pam‧phyl′i‧a, Egypt and the parts of Lib′y‧a, which is toward Cy‧re′ne, and sojourners from Rome, both Jews and proselytes,11Cre′tans and Arabians, we hear them speaking in our tongues about the magnificent things of God.” 12 Yes, they were all astonished and were in perplexity, saying one to another: “What does this thing purport to be?” 13 However, different ones mocked at them and began to say: “They are full of sweet wine.