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: 6105
Abu Usaid Ansari has reported this hadith through another chain of transmitters. When the Holy Prophet (may peace be upon him) was marching towards Badr in order