Language:
كتاب المغازى
64  
Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
(29)
Chapter: The Ghazwa of Al-Khandaq or Al-Ahzab Battle
(29)
باب غَزْوَةُ الْخَنْدَقِ وَهْىَ الأَحْزَابُ
Sahih al-Bukhari 4103

Narrated `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).

حَدَّثَنِي عُثْمَانُ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عَبْدَةُ، عَنْ هِشَامٍ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، رضى الله عنها ‏{‏إِذْ جَاءُوكُمْ مِنْ فَوْقِكُمْ وَمِنْ أَسْفَلَ مِنْكُمْ وَإِذْ زَاغَتِ الأَبْصَارُ‏}‏ قَالَتْ كَانَ ذَاكَ يَوْمَ الْخَنْدَقِ‏.‏
Reference : Sahih al-Bukhari 4103
In-book reference : Book 64, Hadith 147
USC-MSA web (English) reference : Vol. 5, Book 59, Hadith 429
  (deprecated numbering scheme)