Sayyiduna Abu Hurayrah (may Allah be pleased with him) said that he (peace and blessings be upon him) said: "I have been helped with awe, and I have been given comprehensive words. Once, while I was asleep, the keys to the treasures of the earth were brought and placed in my hand." Abu Hurayrah said: The Messenger of Allah (peace and blessings be upon him) has gone, and you are extracting them (those treasures).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13318