John 4:46-50

Then he came again to Cana in Galilee where he had changed water into wine. Now there was a royal official whose son lay ill in Capernaum. When he heard that Jesus had come from Judea to Galilee, he went and begged him to come down and heal his son, for he was at the point of death.  Then Jesus said to him; "Unless you see signs and wonders you will not believe." The official said to him, "Sir, come down before my little boy dies." Jesus said to him, "Go, your son will live." The man believed the word that Jesus spoke to him and started on his way.