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 4114

Narrated Abu Huraira:

Allah's Messenger (ﷺ) used to say, "None has the right to be worshipped except Allah Alone (Who) honored His Warriors and made His Slave victorious, and He (Alone) defeated the (infidel) clans; so there is nothing after Him.

حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا اللَّيْثُ، عَنْ سَعِيدِ بْنِ أَبِي سَعِيدٍ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ يَقُولُ ‏ "‏ لاَ إِلَهَ إِلاَّ اللَّهُ وَحْدَهُ، أَعَزَّ جُنْدَهُ، وَنَصَرَ عَبْدَهُ وَغَلَبَ الأَحْزَابَ وَحْدَهُ، فَلاَ شَىْءَ بَعْدَهُ ‏"‏‏.‏
Reference : Sahih al-Bukhari 4114
In-book reference : Book 64, Hadith 158
USC-MSA web (English) reference : Vol. 5, Book 59, Hadith 440
  (deprecated numbering scheme)