Hammam b. Munabbih reported:
That is what Abu Huraira reported to us from the Messenger of Allah (ﷺ) and he narrated (some) ahadith one of which is that the Messenger of Allah (ﷺ) said: I have been helped by terror (in the hearts of enemies) and I have been given words which are concise but comprehensive in meaning.
Reference: Sahih Muslim 523 f
In-book reference: Book 5, Hadith 12
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1067