On the next day, he was determined to go out into Galilee, and he found Philip. Jesus said to him, "Follow me."
On the morrow ...  This indicates the fourth successive day of the epic events here narrated by John.  Critics have sometimes alleged a lack of progression in John; but the progression of events that occurred in these four days was vividly presented in their exact chronological sequence. This verse brings us to the moment when Jesus was ready to leave Bethany beyond Jordan and go to Cana in Galilee where he would perform the beginning of his miracles; but, before his departure two more disciples would be added to the little company.  It is not necessary to inquire how the Lord found Philip, who, in all probability, was one of that small select group of John's followers who were expecting the Messiah.  Jesus knew him, no less than he knew Peter and the other apostles; and therefore he called him.