Language:
كتاب المغازى
64  
Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
(43)
Chapter: ‘'Umra Al-Qada’
(43)
باب عُمْرَةُ الْقَضَاءِ
Sahih al-Bukhari 4255

Narrated Ibn Abi `Aufa:

When Allah's Messenger (ﷺ) performed the `Umra (which he performed in the year following the treaty of Al-Hudaibiya) we were screening Allah's Messenger (ﷺ) from the infidels and their boys lest they should harm him.

حَدَّثَنَا عَلِيُّ بْنُ عَبْدِ اللَّهِ، حَدَّثَنَا سُفْيَانُ، عَنْ إِسْمَاعِيلَ بْنِ أَبِي خَالِدٍ، سَمِعَ ابْنَ أَبِي أَوْفَى، يَقُولُ لَمَّا اعْتَمَرَ رَسُولُ اللَّهِ صلى الله عليه وسلم سَتَرْنَاهُ مِنْ غِلْمَانِ الْمُشْرِكِينَ وَمِنْهُمْ، أَنْ يُؤْذُوا رَسُولَ اللَّهِ صلى الله عليه وسلم‏.‏
Reference : Sahih al-Bukhari 4255
In-book reference : Book 64, Hadith 289
USC-MSA web (English) reference : Vol. 5, Book 59, Hadith 556
  (deprecated numbering scheme)