The Book of Acts 2:1-13

The fulfillment of Jesus's promised "enduement with power" began on the Jewish Festival of Weeks, known as "Pentecost", which is simply the Greek for fiftieth. This eyewitness account makes special note that there were devout men from all over the known world who were astonished at the event. They heard what was spoken in their own languages. What makes this supernatural event special is that it doesn't say the disciples were speaking those languages, but the hearers understood. This Feast not only marked the beginning of the wheat harvest but also the end time harvest. "Pray that the Lord of the harvest sends out laborers".