Acts 19:3

Overview - Acts 19
The Holy Ghost is given by Paul's hands.
The Jews blaspheme his doctrine, which is confirmed by miracles.
13 The Jewish exorcists,
16 are beaten by the devil.
19 Conjuring books are burnt.
21 Demetrius, for love of gain, raises an uproar against Paul;
35 which is appeased by the townclerk.
Treasury of Scripture Knowledge

Acts 19:3  (King James Version)
And he said unto them, Unto what then were ye baptized? And they said, Unto John's baptism.

Unto what
Matthew 28:19 ; 1 Corinthians 12:13

Unto John's
18:25 Matthew 3:1-17 ; Luke 3:1-38