John Calvin on John 1:28

28. These things were done in Bethabara. The place is mentioned, not only to authenticate the narrative, but also to inform us that this answer was given amidst a numerous assembly of people; for there were many who flocked to John’s baptism, and this was his ordinary place for baptizing. It is likewise supposed by some to be a passage across Jordan, and, from this circumstance, they derive the name, for they interpret it the house of passage; unless, perhaps, some may prefer the opinion of those who refer to the memorable passage of the people, (Joshua 3:13,) when God opened up a way for them in the midst of the waters, under the direction of Joshua. Others say that it ought rather to be read Betharaba. Instead of Bethabara, some have inserted here the name Bethany, but this is a mistake; for we shall afterwards see how near Bethany was to Jerusalem. The situation of Bethabara, as laid down by those who have described the country, agrees best with the words of the Evangelist; though I have no wish to dispute about the pronunciation of the word.

John 1:29-34

29. The next day, John seeth Jesus coming to him, and saith, Behold the Lamb of God, which taketh away the sin of the world! 30. This is he of whom I said, After me cometh a man who was preferred to me, because he was more excellent than I. 31. And I knew him not; but in order that he might be manifested to Israel, therefore I came baptizing with water. 32. And John testified, saying, I saw the Spirit descending like a dove from heaven, and it remained upon him. 33. And I knew him not; but he who sent me to baptize with water said to me, Upon whom thou shalt see the Spirit descending and remaining on him, it is he who baptizeth with the Holy Ghost. 34. I saw therefore, and testified, that he is the Son of God.