When the day of Pentecost came, they were all together in one place. Suddenly a sound like the blowing of a violent wind came from heaven and filled the whole house where they were sitting. They saw what seemed to be tongues of fire that separated and came to rest on each of them. All of them were filled with the Holy Spirit and began to speak in other tongues as the Spirit enabled them - Acts 2:1-4.
And a prayer:
Almighty God, who on this day
didst open the way of eternal life
to every race and nation
by the promised gift of thy Holy Spirit:
Shed abroad this gift throughout the world
by the preaching of the Gospel,
that it may reach to the ends of the earth;
through Jesus Christ our Lord, who liveth and reigneth
with thee, in the unity of the Holy Spirit,
one God, for ever and ever. Amen.