Abu Hurayrah (may Allah be pleased with him) said: I heard the Prophet (peace and blessings be upon him) saying: "I saw in a dream a well with a bucket on it, and I drew water from it as much as Allah willed. Then Ibn Abi Quhafah (may Allah be pleased with him) drew one or two buckets, but there was weakness in his drawing, may Allah forgive him. Then it turned into a large bucket and Umar (may Allah be pleased with him) took hold of it, and I have not seen a man as outstanding as him. Umar (may Allah be pleased with him) kept drawing water until the people were satisfied (and settled their camels around it)."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قتال أهل البغي / 16593