When the ruler of the feast tasted the water now become wine, and didn't know where it came from (but the servants who had drawn the water knew), the ruler of the feast called the bridegroom,

 For a Jewish feast wine was essential. "Without wine," said the Rabbis, "there is no joy." It was not that people were drunken, but in the East wine was an essential. Drunkenness was in fact a great disgrace, and they actually drank their wine in a mixture composed of two parts of wine to three parts of water. At any time the failure of provisions would have been a problem, for hospitality in the East is a sacred duty; but for the provisions to fail at a wedding would be a terrible humiliation for the bride and the bridegroom. 