Abu Huraira reported:
The Messenger of Allah (ﷺ) said: I have been helped by terror (in the heart of the enemy) ; I have been given words which are concise but comprehensive in meaning; and while I was asleep I was brought the keys of the treasures of the earth which were placed in my hand. (RU)
Reference (RU): Sahih Muslim 523 e (RU)
In-book reference (RU): Book 5, Hadith 11 (RU)
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1066 (RU)