Sahih al-Bukhari 4109
Book 64: Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi) · Narrated by Sulaiman bin Surad
Arabic
حَدَّثَنَا أَبُو نُعَيْمٍ، حَدَّثَنَا سُفْيَانُ، عَنْ أَبِي إِسْحَاقَ، عَنْ سُلَيْمَانَ بْنِ صُرَدٍ، قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم يَوْمَ الأَحْزَابِ " نَغْزُوهُمْ وَلاَ يَغْزُونَنَا ".
English translation
Narrated Sulaiman bin Surad:On the day of Al-Ahzab (i.e. clans) the Prophet (ﷺ) said, (After this battle) we will go to attack them(i.e. the infidels) and they will not come to attack us
Reference: Sahih al-Bukhari 4109, Book of Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi). English translation by Dr. Muhammad Muhsin Khan.