Acts 2:4-6

Amplified Bible

⁴ And they were all filled [that is, diffused throughout their being] with the Holy Spirit and began to speak in other ^[a]tongues (different languages), as the Spirit was giving them the ability to speak out [clearly and appropriately].

⁵ Now there were Jews living in Jerusalem, devout and God-fearing men from every nation under heaven. ⁶ And when this sound was heard, a crowd gathered, and they were bewildered because each one was hearing those in the upper room speaking in his own language or dialect.