Acts 2:1-6 (NRSV)
1 When the day of Pentecost had come, they were all together in one place. 2 And suddenly from heaven there came a sound like the rush of a violent wind, and it filled the entire house where they were sitting. 3 Divided tongues, as of fire, appeared among them, and a tongue rested on each of them. 4 All of them were filled with the Holy Spirit and began to speak in other languages, as the Spirit gave them ability.

5 Now there were devout Jews from every nation under heaven living in Jerusalem. 6 And at this sound the crowd gathered and was bewildered, because each one heard them speaking in the native language of each.

Acts 2:22-24 (NRSV)
22 “You that are Israelites, listen to what I have to say: Jesus of Nazareth, a man attested to you by God with deeds of power, wonders, and signs that God did through him among you, as you yourselves know— 23 this man, handed over to you according to the definite plan and foreknowledge of God, you crucified and killed by the hands of those outside the law. 24 But God raised him up, having freed him from death, because it was impossible for him to be held in its power.

Acts 2:36-39 (NRSV)
36 Therefore let the entire house of Israel know with certainty that God has made him both Lord and Messiah, this Jesus whom you crucified.”

37 Now when they heard this, they were cut to the heart and said to Peter and to the other apostles, “Brothers, what should we do?” 38 Peter said to them, “Repent, and be baptized every one of you in the name of Jesus Christ so that your sins may be forgiven; and you will receive the gift of the Holy Spirit. 39 For the promise is for you, for your children, and for all who are far away, everyone whom the Lord our God calls to him.”

Acts 2:43-47 (NRSV)
43 Awe came upon everyone, because many wonders and signs were being done by the apostles. 44 All who believed were together and had all things in common; 45 they would sell their possessions and goods and distribute the proceeds to all, as any had need. 46 Day by day, as they spent much time together in the temple, they broke bread at home and ate their food with glad and generous] hearts, 47 praising God and having the goodwill of all the people. And day by day the Lord added to their number those who were being saved.