“Then there arose a question between some of John's disciples and the Jews about purifying.”
King James Version (KJV)
3:25 The Jews - Those men of Judea, who now went to be baptized by Jesus; and John's disciples, who were mostly of Galilee: about purifying - That is, baptism. They disputed, which they should be baptized by.
Joh 3:25 There arose a question, etc. The Revised Version says "with a Jew", probably a Pharisee who associated baptism with ceremonial purification.