Just before His ascension, Jesus told the apostles to wait in Jerusalem for the promised Holy Spirit, so that they would receive power to be His witnesses. They obeyed. The remaining eleven disciples gathered in an upper room in Jerusalem “with the women and Mary the mother of Jesus, and with His brothers.”
Those scattered in fear by Christ’s crucifixion were now gathered in faith by Christ’s resurrection and ascension. Even the brothers of Jesus were in “one accord” with the disciples now, having come to faith after His resurrection.
This little band of believers “continued” in united prayer over the next ten days while the rest of Jerusalem lay unaware of the spiritual earthquake that was about to turn the world upside down for Christ.