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. (DE)
Reference (DE): Sahih Muslim 523 e (DE)
In-book reference (DE): Book 5, Hadith 11 (DE)
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1066 (DE)