Origen

(tom. vi. c. 30) After this testimony, Jesus is seen coming to John, not only persevering in his confession, but also advanced in goodness: as is intimated by the second day. Wherefore it is said, The next day John seeth Jesus coming to him. Long before this, the Mother of Jesus, as soon as she had conceived Him, went to see the mother of John then pregnant; and as soon as the sound of Mary’s salutation reached the ears of Elisabeth, John leaped in the womb: but now the Baptist himself after his testimony seeth Jesus coming. Men are first prepared by hearing from others, and then see with their own eyes. The example of Mary going to see Elisabeth her inferior, and the Son of God going to see the Baptist, should teach us modesty and fervent charity to our inferiors. What place the Saviour came from when He came to the Baptist we are not told here; but we find it in Matthew, Then cometh Jesus from Galilee to Jordan unto John to be baptized of him. (Matt. 3:13)