Acts 2:6

6Having come aboutγενομένηςnowδὲtheτῆςsoundφωνῆςof thisταύτηςcame togetherσυνῆλθεtheτὸmultitudeπλῆθοςandκαὶwas confoundedσυνεχύθη,becauseὅτιwas hearingἤκουονoneεἷςeachἕκαστοςtheτῇownἰδίᾳlanguageδιαλέκτῳspeakingλαλούντωνthemαὐτῶν·

Now this sound having happened, the multitude came together and was confounded, because each one was hearing them speaking in [his] own language.