‘Jesus of Nazareth, a man attested to you by God with mighty works and wonders and signs that God did through him in your midst, as you yourselves know— this Jesus, delivered up according to the definite plan and foreknowledge of God, you crucified and killed by the hands of lawless men. God raised him up, loosing the pangs of death, because it was not possible for him to be held by it.
‘Now Jesus has been raised by God, and of this we are all witnesses. Exalted at God’s right hand he received from the Father the promised Holy Spirit, and all that you now see and hear [the wonders of speaking in tongues] flows from him. … Let all Israel then accept as certain that God has made this same Jesus, whom you crucified, both Lord and Messiah.’
When they heard this they were cut to the heart, and said to Peter and the other apostles, ‘Friends, what are we to do?’ ‘Repent,” said Peter, ‘and be baptized, every one of you, in the name of Jesus the Messiah; then your sins will be forgiven and you will receive the gift of the Holy Spirit.’…
Those who accepted what he said were baptized, and some three thousand were added to the number of believers that day. They met constantly to hear the apostles teach and to share the common life, to break bread, and to pray.
Acts 2:22-24; 32-38; 41-42