Once the crowd realized that neither Jesus nor his disciples were there, they got into the boats and went to Capernaum in search of Jesus.
When they found him on the other side of the lake, they asked him, "Rabbi, when did you get here?"Jesus answered, "I tell you the truth, you are looking for me, not because you saw miraculous signs but because you ate the loaves and had your fill. Do not work for food that spoils, but for food that endures to eternal life, which the Son of Man will give you. On him God the Father has placed his seal of approval."
Then they asked him, "What must we do to do the works God requires?"
Jesus answered, "The work of God is this: to believe in the one he has sent." - John 6:24-29(NIV)