When he heard that Jesus had come out of Judea into Galilee, he went to him, and begged him that he would come down and heal his son, for he was at the point of death.

 Jesus' answer to his disciples was that he had food of which they knew nothing. In their simplicity they wondered if someone had brought him food to eat. Then he told them: "My food is to do the will of him who sent me." 