They had previously seen Trophimus the Ephesian in the city with Paul and assumed that Paul had brought him into the temple.)

Acts 21:27–36 explains why Paul's public ministry takes a five-year hiatus. He has arrived in Jerusalem only to hear a rumor that he abandoned the Mosaic law.

New International Version (They had previously seen Trophimus the Ephesian in the city with Paul and assumed that Paul had brought him into the temple.)

The next day Paul and the rest of us went to see James, and all the elders were present. Paul greeted them and reported in detail what God had done.

29 For they had before seen with him in the city Trophimus the Ephesian, whom they supposed that Paul had brought into the temple. 30 And all the city was moved ...

They see one thing, they infer another; they could testify to one thing, but they conclude that another thing will also be true, and that other thing they ...

When the seven days of their purification were nearly up, some Jews from around Ephesus spotted him in the Temple. At once they turned the place upside-down.

29 They said this because they had seen Trophimus the Ephesian in the city with Paul. They thought Paul had brought him into the temple area. Acts 21:29 ...

For they had previously seen Trophimus the Ephesian with him in the city, whom they supposed that Paul had brought into the temple.)

The verse is part of the narrative of Paul's visit to Jerusalem and the events that ensue as he seeks to reconcile the Jewish and Gentile Christian communities.