Sahih Muslim Book 4, Hadith Number 1067.

Chapter : Prayer in a single garment.

Hammam b. Munabbih reported: That is what Abu Huraira reported to us from the Messenger of Allah (may peace be upon him) and he narrated (some) ahadith one of which is that the Messenger of Allah (may peace be upon him) 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.