Volume 5 · Book 59 · Hadith 390
Narrated Mu'tamir's father: 'Uthman said that on the day of the battle of Uhud, none remained with the Prophet but Talha and Sad.
— Sahih Bukhari, Volume 5, Book 59: Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi), Hadith #390