And as in the time of building the tower [of Babel] the one tongue was divided into many; so then [at Pentecost] the many tongues frequently met in one man, and the same person used to discourse both in the Persian, and the Roman, and the Indian, and many other tongues, the Spirit sounding within him: and the gift was called the gift of tongues because he could all at once speak divers languages.
John Chrysostom