Acts 2:4-6

They were all filled and equipped with the Holy Spirit and were inspired to speak in tongues—empowered by the Spirit to speak in languages they had never learned! Now, at that time there were Jewish worshipers who had emigrated from many different lands to live in Jerusalem. When the people of the city heard the roaring sound, crowds came running to where it was coming from, stunned over what was happening, because each one could hear the disciples speaking in his or her own language.