Sahih Bukhari
Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
Volume: 005 / Book Number: 059 / Hadith Number: 429
Narrated 'Aisha:
As regards the following Quranic Verse:-- "When they came on you from above and from below you (from east and west of the valley) and when the eyes grew wild and the hearts reached up to the throats....." (33.10) That happened on the day of Al-Khandaq (i.e. Trench).