Musnad Ahmed: Hadith 2966

The Messenger of Allah (ﷺ) woke up one day and there was no water in the camp. A man came to him and said: O Messenger of Allah, there is no water in the camp. He said: "Do you have anything?" He said: Yes. He said: "Bring it to me." He brought him a vessel in which there was a little water. The Messenger of Allah (ﷺ) placed his fingers over the mouth of the vessel and spread his fingers, and springs began to flow from between his fingers. And he instructed Bilal to call out among the people: Blessed water for wudoo'.