John 4:48

Jesus therefore said unto him, Except ye see signs and wonders, ye will in no wise believe.

Except ye see ... is plural, thus it seems that Jesus was here identifying this man with that extensive class of Jews of the same attitude, suggesting that the nobleman himself was a Jew.

Signs and wonders ... is not a reference to two kinds of miracles, but rather to the two qualities in every miracle. A wonder is something exciting, phenomenal, and extraordinary; but the same deed, viewed in the light shed upon the person of Jesus, is a sign of the Lord's deity. If the nobleman had indeed been in Jerusalem and had witnessed Jesus' mighty wonders there, the rebuke would have reference to the weakness of his faith in the light of the evidence he had witnessed. The rebuke, however, was so stated as to encourage the nobleman to believe more fully.