Jesus said to them, "Fill the water pots with water." They filled them up to the brim.

 There was a tax that every Jew over nineteen years of age must pay. That was the Temple tax. It was necessary that all should pay that tax so that the Temple sacrifices and the Temple ritual might be carried out day by day. The tax was one half-shekel. We must always remember, when we are thinking of sums of money, that at this time a working man's wage was about less than 4 pence per day. The value of a half-shekel was about 6 p. It was, therefore, equivalent to almost two days' wages. For all ordinary purposes in Palestine all kinds of currency were valid. Silver coins from Rome and Greece and Egypt and Tyre and Sidon and Palestine itself all were in circulation and all were valid. But the Temple tax had to be paid either in Galilaean shekels or in shekels of the sanctuary. These were Jewish coins, and so could be used as a gift to the Temple; the other currencies were foreign and so were unclean; they might be used to pay ordinary debts, but not a debt to God. 