At a marriage feast in Cana attended by Jesus and some relatives and friends, the host was embarrassed when he learnt that the supply of wine had run out. Mary told Jesus, apparently thinking he
could work a miracle to provide extra wine. In this way he could display his messianic power and so convince people who he was. Jesus reminded her that he could not perform miracles just to please relatives and friends. This was not a time for a public demonstration of his messiahship (John 2:1-5).
Nevertheless, Jesus helped the host out of the difficulty. He performed the miracle privately, but the host immediately noticed the superior quality of the wine he produced. By this miracle Jesus showed his disciples, for the first time, something of the glorious power of the Messiah (John 2:6-11). He then moved back to Capernaum on the shore of Lake Galilee (John 2:12).