Sahih al-Bukhari 2610
Sahih al-Bukhari · Book 51: Gifts · Whosoever is given a gift while some people are sitting with him, he only has the right to have it
Narrated Ibn `Umar:
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مُحَمَّدٍ ، حَدَّثَنَا ابْنُ عُيَيْنَةَ ، عَنْ عَمْرٍو ، عَنِ ابْنِ عُمَرَ ـ رضى الله عنهما ـ أَنَّهُ كَانَ مَعَ النَّبِيِّ صلى الله عليه وسلم فِي سَفَرٍ فَكَانَ عَلَى بَكْرٍ لِعُمَرَ صَعْبٍ، فَكَانَ يَتَقَدَّمُ النَّبِيَّ صلى الله عليه وسلم فَيَقُولُ أَبُوهُ يَا عَبْدَ اللَّهِ لاَ يَتَقَدَّمِ النَّبِيَّ صلى الله عليه وسلم أَحَدٌ. فَقَالَ لَهُ النَّبِيُّ صلى الله عليه وسلم " بِعْنِيهِ ". فَقَالَ عُمَرُ هُوَ لَكَ. فَاشْتَرَاهُ ثُمَّ قَالَ " هُوَ لَكَ يَا عَبْدَ اللَّهِ، فَاصْنَعْ بِهِ مَا شِئْتَ " .
That he was in the company of the Prophet (ﷺ) on a journey, riding a troublesome camel belonging to `Umar. The camel used to go ahead of the Prophet, so Ibn `Umar's father would say, "O `Abdullah! No one should go ahead of the Prophet." The Prophet (ﷺ) said to him, "Sell it to me." `Umar said to the Prophet "It is for you." So, he bought it and said, "O `Abdullah! It is for you, and you can do with it what you like."