At His ascension Jesus had said to the apostles: John baptized with
water; but ye shall be baptized with the Holy Spirit, not many days
hence. Until this came to pass, they were to abide at Jerusalem. On one
of these days they chose one of the disciples named Matthias to be
apostle in the place of Judas.
On the morning of the day of Pentecost, ten days after the ascension,
the apostles were assembled as usual. And suddenly there came from
heaven the sound as of a mighty wind, and it filled all the house where
they were sitting. And there appeared unto them tongues as of fire,
parting asunder; and it sat upon each one of them. And they were all
filled with the Holy Spirit, and began to speak with other tongues, as
the Spirit gave them utterance.
Now, there were dwelling at Jerusalem Jews from every nation. When this
sound was heard, they came together and said: What is this? Are not all
these men Galileans? And how hear we then every man in our own language
speaking the mighty words of God? But Peter, standing up, spake forth
unto them saying: Jesus of Nazareth, whom ye have crucified, sitteth now
at the right hand of God, and has poured out His Holy Spirit. Now, when
they heard this, they were pricked in their heart and they said: What
shall we do? Peter answered: Repent ye, and be baptized in the name of
Jesus Christ unto the remission of your sins; and ye shall receive the
gift of the Holy Spirit. They then that received the word were baptized
on the same day, about three thousand souls.
And all that believed were daily together in prayer, and in breaking the
bread in the Lord’s Supper. They sold their possessions, and parted them
to all, according as any man had need. And day by day the Lord added
others to the congregation. (Acts 2.)