Sahih al-Bukhari, Volume 4, Book 56, Number 779:

Narrated ‘Abdullah:

We used to consider miracles as Allah’s Blessings, but you people consider them to be a warning. Once we were with Allah’s Apostle on a journey, and we ran short of water. He said, “Bring the water remaining with you.” The people brought a utensil containing a little water. He placed his hand in it and said, “Come to the blessed water, and the Blessing is from Allah.” I saw the water flowing from among the fingers of Allah’s Apostle, and no doubt, we heard the meal glorifying Allah, when it was being eaten (by him).