Luke
Acts 19:3ESV·traditional attribution

And he said, “Into what then were you baptized?” They said, “Into John’s baptism.”

Matthew Henry Presbyterian @wholebiblehenry

Ephesus was a city of great note in Asia, famous for a temple built there to Diana, which was one of the wonders of the world: thither Paul came to preach the gospel while Apollos was at Corinth (Act 19:1); while he was watering there, Paul was planting here, and grudged not that Apollos entered into his labours and was building upon his foundation, but...

Commenting on Acts 19:1-7

John Gill Reformed Baptist @doctorgill

And he said unto them, unto what then were ye baptized?.... The apostle takes it for granted that they were baptized, since they were not only believers, but disciples; such as not only believed with the heart, but had made a profession of their faith, and were followers of Christ; but asks unto what they were baptized; either in whose name they were baptized, since...

Albert Barnes Presbyterian @notesbybarnes

Verse 3. Unto what. Unto what faith, or doctrine. What did you profess to believe when you were baptized. Unto John's baptism. . (|) "Unto" "Into" (f) "John's Baptism"