Sahih al-Bukhari
Sahih al-Bukhari 4186
حَدَّثَنِي شُجَاعُ بْنُ الْوَلِيدِ، سَمِعَ النَّضْرَ بْنَ مُحَمَّدٍ، حَدَّثَنَا صَخْرٌ، عَنْ نَافِعٍ، قَالَ إِنَّ النَّاسَ يَتَحَدَّثُونَ أَنَّ ابْنَ عُمَرَ، أَسْلَمَ قَبْلَ عُمَرَ، وَلَيْسَ كَذَلِكَ، وَلَكِنْ عُمَرُ يَوْمَ الْحُدَيْبِيَةِ أَرْسَلَ عَبْدَ اللَّهِ إِلَى فَرَسٍ لَهُ عِنْدَ رَجُلٍ مِنَ الأَنْصَارِ يَأْتِي بِهِ لِيُقَاتِلَ عَلَيْهِ، وَرَسُولُ اللَّهِ صلى الله عليه وسلم يُبَايِعُ عِنْدَ الشَّجَرَةِ، وَعُمَرُ لاَ يَدْرِي بِذَلِكَ، فَبَايَعَهُ عَبْدُ اللَّهِ، ثُمَّ ذَهَبَ إِلَى الْفَرَسِ، فَجَاءَ بِهِ إِلَى عُمَرَ، وَعُمَرُ يَسْتَلْئِمُ لِلْقِتَالِ، فَأَخْبَرَهُ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم يُبَايِعُ تَحْتَ الشَّجَرَةِ ـ قَالَ ـ فَانْطَلَقَ فَذَهَبَ مَعَهُ حَتَّى بَايَعَ رَسُولَ اللَّهِ صلى الله عليه وسلم، فَهِيَ الَّتِي يَتَحَدَّثُ النَّاسُ أَنَّ ابْنَ عُمَرَ أَسْلَمَ قَبْلَ عُمَرَ .
People say that Ibn ʿUmar became Muslim before ʿUmar, but that is not so. On the day of al-Ḥudaybiya, ʿUmar sent ʿAbd Allāh to fetch a horse of his from a man of the Anṣār, so that he could fight on it. The Messenger of Allah was taking the pledge beneath the tree, and ʿUmar did not know this. ʿAbd Allāh pledged allegiance to him, then went to fetch the horse and brought it to ʿUmar, who was preparing himself for battle. He told ʿUmar that the Messenger of Allah was taking the pledge beneath the tree. ʿUmar went with him and pledged allegiance to the Messenger of Allah. This is why people say Ibn ʿUmar became Muslim before ʿUmar.