John, the first-century eye-witness biographer of Jesus, details several miracles of Jesus. Importantly, John specifically calls them “signs”. In doing so he raises the question, “To what does the sign actually point?” The first “sign” is “at Cana of Galilee” – at “a wedding”.
And, lacking wine, the mother of Jesus stated to him, “They have no wine!” And Jesus stated to her, “What? For me – and for you a woman? My hour has not yet arrived.” His mother stated to the servants, “That something he may state to you, do!”
“The mother of Jesus” saw that they were “lacking wine” despite the fact (see below) that they may already have received some which may well have fallen short on quality. Jesus’ reply to his mother, “What? For me – and for you a woman?”, draws attention away from the wine and towards the “sign”.
He is also reluctant to do anything about the “lacking wine” for another reason: “My hour has not yet arrived”. But will he do a “sign”?
In fact six stone water jars were lying there, with respect to the cleansing of the Jews, having space for two or three measures apiece.
These “six stone water jars” were dormant - “lying there”. They had been used for “purification” – for ritual cleansing from sin. A “measure” (Greek metretas) was around 40 litres. Was this “purification” process like the wine – not the best?
Jesus stated to them, “Fill full the water jars with water.” And they filled them full until above.