Acts 19:1 - 4
ESV - 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.
For follow-up discussion and general commentary on the topic. Comments are sorted chronologically.