Philip Proclaims Christ in Samaria
4 Now those who were scattered went about preaching the word. 5 Philip went down to the city  of Samaria and proclaimed to them the Christ. 6 And the crowds with one accord paid attention to what was being said by Philip when they heard him and saw the signs that he did. 7 For unclean spirits, crying out with a loud voice, came out of many who had them, and many who were paralyzed or lame were healed. 8 So there was much joy in that city.
Simon the Magician Believes
9 But there was a man named Simon, who had previously practiced magic in the city and amazed the people of Samaria, saying that he himself was somebody great. 10 They all paid attention to him, from the least to the greatest, saying, “This man is the power of God that is called Great.” 11 And they paid attention to him because for a long time he had amazed them with his magic. 12 But when they believed Philip as he preached good news about the kingdom of God and the name of Jesus Christ, they were baptized, both men and women. 13 Even Simon himself believed, and after being baptized he continued with Philip. And seeing signs and great miracles  performed, he was amazed.
14 Now when the apostles at Jerusalem heard that Samaria had received the word of God, they sent to them Peter and John, 15 who came down and prayed for them that they might receive the Holy Spirit, 16 for he had not yet fallen on any of them, but they had only been baptized in the name of the Lord Jesus. 17 Then they laid their hands on them and they received the Holy Spirit.
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Paul in Ephesus
19:1 And it happened that while Apollos was at Corinth, Paul passed through the inland  country and came to Ephesus. There he found some disciples. 2 And he said to them, “Did you receive the Holy Spirit when you believed?” And they said, “No, we have not even heard that there is a Holy Spirit.” 3 And he said, “Into what then were you baptized?” They said, “Into John's baptism.” 4 And Paul said, “John baptized with the baptism of repentance, telling the people to believe in the one who was to come after him, that is, Jesus.” 5 On hearing this, they were baptized in  the name of the Lord Jesus. 6 And when Paul had laid his hands on them, the Holy Spirit came on them, and they began speaking in tongues and prophesying. 7 There were about twelve men in all. (ESV)