Acts 19:1
Then, while Apollos was [still] at Corinth, Paul traveled through the [western] districts and came to Ephesus where he found some disciples.
Acts 18:1
After this happened Paul left Athens and went to Corinth [i.e., a principal city of Greece].
1 Corinthians 1:12
Now this is what I mean: Each of you is saying, "I am a follower of Paul," and another "I am a follower of Apollos," and another "I am a follower of Cephas [i.e., Peter]," and another "I am a follower of Christ."
1 Corinthians 16:12
Now concerning our brother Apollos: I strongly urged him to go to you with the other brothers, but he was not at all willing to do so at this time. But he will go when he has the opportunity.
Acts 18:19-21
When they arrived at Ephesus, Paul left Priscilla and Aquila there. He then went into the [Jewish] synagogue and held discussions with the Jews.
Acts 18:23-28
After spending some time there, he left and traveled through the district of Galatia, [and] then through Phrygia, strengthening [spiritually] all the disciples [along the way].
1 Corinthians 3:4-7
For when one of you says, "I am a follower of Paul," and another says, "I am a follower of Apollos," are you not [acting like worldly] people?