The text that we have available to us today may clearly state the singular form, but that still does not sit well with me. If we look at Acts 2:3 to 4, a more plausible translation would be: “And there appeared unto them cloven tongues like as of fire, and it [a holy spirit] sat upon each of them. And they were all [each] filled with the [a] Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance.” This is consistent with the other occurrences of Prophets throughout the Bible. In this case though, Jesus’ promise to “send the teachers” had been fulfilled and now there were hundreds of Prophets (divine messengers) speaking in the same place.