Narrated Ibn Abi Aufa:

When Allah's Apostle performed the 'Umra (which he performed in the year following the treaty of Al-Hudaibiya) we were screening Allah's Apostle 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 ﷺ سَتَرْنَاهُ مِنْ غِلْمَانِ الْمُشْرِكِينَ وَمِنْهُمْ، أَنْ يُؤْذُوا رَسُولَ اللَّهِ ﷺ.