(29) باب غَزْوَةُ الْخَنْدَقِ وَهْىَ الأَحْزَابُ
Narrated Ibn `Umar:
The first day (i.e. Ghazwa) I participated in, was the day of Al-Khandaq (i.e. Trench).
Reference: Sahih al-Bukhari 4107
In-book reference: Book 64, Hadith 151
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 5, Book 59, Hadith 433