They were all filled with the Holy Spirit, and began to speak in different languages.
When the day of Pentecost came it found the brethren gathered in one place. Suddenly from up in the sky there came a noise like a strong, driving wind which was heard all through the house where they were seated. Tongues as of fire appeared which parted and came to rest on each of them. All were filled with the Holy Spirit. They began to express themselves in foreign tongues and make bold proclamation as the Spirit prompted them.
Staying in Jerusalem at the time were devout Jews of every nation under heaven. These heard the sound, and assembled in a large crowd. They were much confused because each one heard these men speaking his own language. The whole occurrence astonished them. They asked in utter amazement, "Are not all of these men who are speaking Galileans? How is it that each of us hears them in his native tongue? We are Parthians, Medes, and Elamites. We live in Mesopotamia, Judea and Cappadocia, Pontus, the Province of Asia, Phrygia and Pamphylia, Egypt, and the regions of Libya around Cyrene. There are even visitors from Rome -- all Jews, or those who have come over to Judaism; Cretans and Arabs too. Yet each of us hears them speaking in his own tongue about the marvels God has accomplished".
John 20:19-23 (A,B,C)
On the evening of that first day of the week, even though the disciples had locked the doors of the place where they were for fear of the Jews, Jesus came and stood before them.
Pentecosts of the Old and New Testaments
The Pentecost is an Old Testament Jewish Feast, and also the time of the Holy Spirit descending on the disciples in the New Testament. Pentecost is a Greek word meaning 'Fifty' (50) and comes from the Feast of Weeks of Leviticus 23:16. Fifty days had elapsed from the Resurrection of Jesus until the descent of the Holy Ghost.
The Hebrew Feast of Weeks or Day of the First-fruits, as it was also called, came seven weeks after the Passover. It was one of the three great annual festivals held in Jerusalem, the other two being Passover and the Feast of Tabernacles. Also called the Feast of the Harvest, the First-fruits of Labor, the Feast of Weeks and the Day of First-fruits. All males, no matter where in the world they lived, were required by law to attend these Feasts. Consequently the city of Jerusalem was filled with devout Jews on the day of the first Christian Pentecost, it was a Sunday.
The whole period of 50 days, being kept in honor and memory of the Savior's Resurrection, was a time of more than ordinary joy, and it was a custom of very general observance to worship standing, instead of kneeling, during the whole of this space, to mark the joyful character. Many churches throughout the empire would sprout by this first introduction of the seed of the Gospel by those Jews who came up from thence, from Jerusalem, and witnessed the events of the day of Pentecost. Thus at the day of Pentecost there were at Jerusalem (on account of the dispersion) devout Jews out of every nation under Heaven.
Pentecost was also the Anniversary of the Law. It was on that very day that Moses gathered Israel around Mount Sinai and God came out in majesty and gave His Law with His thunders and lightnings and they stood trembling and entered into the Covenant of Works with Him. The Holy Ghost came on that anniversary because the Holy Ghost is the New Law of the Christian. The Old Law was written on stone. The New Law is written on the hearts of every person.
Upon the death of Jesus, the disciples hid themselves behind closed doors for fear of the Jews. Fifty days later they stood in the midst of the multitudes who had witnessed the death of Jesus to proclaim the great fact of His Resurrection. The announcement of that fact, ran like fire through the populace; a new light streamed into their minds, a new force moved their hearts, a new society, the Church, was begotten by the Spirit of God Who came to reveal the Truth of the Life and Death and Resurrection of Jesus Christ, the Eternal Son of God. New life, new joy, the victory over sin and death, came through His triumph. Many people who had watched Jesus die believed all the disciples said about His Resurrection.