Musnad Ahmad 1387

Dawood bin Khalid bin Dinar narrated that He and a man called Abu Yoosuf, who was from (the tribe of) Banu Taim, passed by Rabee"ah bin Abi ‘AbdurRahman (رضي الله عنه) and Abu Yoosuf said to him: “We find that you have a hadeeth that we did not find with anyone else.” He said: “I have a lot of hadeeths, but Rabee"ah bin al Hudair - who used to stay close to Talhah bin "Ubaidullah - said that he did not hear Talhah narrate any hadeeth from the Messenger of Allah (ﷺ) except one.” Rabee"ah bin Abi ‘Abdur-Rahman said: “I said to him: “What is it?” He said: “Talhah said to me: “We went out with the Messenger of Allah (ﷺ) until we approached Harrat Waqim. When we drew close to it, we saw some graves at a turn in the valley and we said: “O Messenger of Allah(ﷺ), are these the graves of our brothers?” He said: “The graves of our companions." Then he left and when we came to the graves of the martyrs, the Messenger of Allah (ﷺ) said: "These are the graves of our Brothers.””