Sahih Muslim
The Book Pertaining to the Merits of the Companions (Allah Be Pleased With Them) of the Holy Prophet (May Peace Be Upon Him) (Kitab Al-Fadail Al-Sahabah)
Book Number: 031 / Hadith Number: 5937
Abu 'Uthman reported on one of the days when Allah's Messenger (may peace be upon him) was fighting and none remained with him save Talha and Sa'd.