Sahih al-Bukhari 4060
Sahih al-Bukhari · Book 64: Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi) · “…but Allah was their Wali.”
Narrated Mu'tamir's father:
حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ ، عَنْ مُعْتَمِرٍ ، عَنْ أَبِيهِ ، قَالَ زَعَمَ أَبُو عُثْمَانَ أَنَّهُ لَمْ يَبْقَ مَعَ النَّبِيِّ صلى الله عليه وسلم فِي بَعْضِ تِلْكَ الأَيَّامِ الَّتِي يُقَاتِلُ فِيهِنَّ غَيْرُ طَلْحَةَ وَسَعْدٍ . عَنْ حَدِيثِهِمَا.
`Uthman said that on the day of the battle of Uhud, none remained with the Prophet (ﷺ) but Talha and Sa`d.