Sahih Bukhari | Volume 5 | Hadith Number 429

Narrated by 'Aisha
As regards the following Qur'anic 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).