Disciples were waiting in Jerusalem
After the death of Jesus Christ the disciples were waiting in Jerusalem with one accord for the time that their Master Jesus Christ had promised. The time when the Comforter will arrive. Those were really hard times because the Romans and the Jewish High Priests were strong-willed in suppressing the followers of Jesus. Fear, confusion, uncertainty, anxiety were all that filled the hearts of the disciples. Since the time when they met Jesus, they never were in such situation. The hardest part of these moments was the absence of Jesus. But as they gathered together in one place and in one accord, there came the time of the Lord.
And when the day of Pentecost was fully come, they were all with one accord in one place. And suddenly there came a sound from heaven as of a rushing mighty wind, and it filled all the house where they were sitting. And there appeared unto them cloven tongues like as of fire, and it sat upon each of them. And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance. Acts 2: 1 – 4.