World Wide Study Bible
a Bible passage
7. Fill the water-pots with water. The servants might be apt to look upon this injunction as absurd; for they had already more than enough of water. But in this way the Lord often acts towards us, that his power may be more illustriously displayed by an unexpected result; though this circumstance is added to magnify the miracle; for when the servants drew wine out of vessels which had been filled with water, no suspicion can remain.