Now John also was baptizing at Aenon near Salim, because there was plenty of water, and people were constantly coming to be baptized.
This is a proof text for Baptists. The point about there being plenty of water demonstrates that baptism was about immersion. When discussions were being held by King James with the Bishops and the Puritans about the 1611 translation of the Bible, one of the stipulations that James made was that Baptidso should not be translated, merely transliterated. He didn't want it realized that this was a technical term of the dyeing industry. You don't just sprinkle dye on cloth; you have to dip the cloth in the dye.
just think, John the Baptist might have been called the Big Dipper.