According to the Book of Acts, about 3,000 people were added to the disciples on the day of Pentecost.
Acts 2 describes the disciples gathered in Jerusalem when the Holy Spirit came upon them. They began speaking in other languages, and visitors from many regions heard them proclaiming God’s deeds. Peter then addressed the crowd and urged listeners to repent and be baptised.
Acts says that approximately 3,000 people accepted the message and were baptised that day. The number is presented as part of the rapid growth of the Jerusalem movement after Jesus’ resurrection and ascension.
Pentecost was already a Jewish festival, also known as the Feast of Weeks or Shavuot. Acts’ account therefore places the movement’s dramatic expansion within a major pilgrimage festival, when Jerusalem contained visitors from across the eastern Mediterranean and beyond.