John 4:48 KJV
Then said Jesus unto him, Except ye see signs and wonders, ye will not believe.
John 4:46–50 KJV Chapter Context
46
So Jesus came again into Cana of Galilee, where he made the water wine. And there was a certain nobleman, whose son was sick at Capernaum.
47
When he heard that Jesus was come out of Judæa into Galilee, he went unto him, and besought him that he would come down, and heal his son: for he was at the point of death.
48
Then said Jesus unto him, Except ye see signs and wonders, ye will not believe.
49
The nobleman saith unto him, Sir, come down ere my child die.
50
Jesus saith unto him, Go thy way; thy son liveth. And the man believed the word that Jesus had spoken unto him, and he went his way.