Abu Dawud Book 4, Hadith Number 2038.

Chapter : Not known.

Narated By Talhah ibn Ubaydullah : Rabi’ah ibn al-Hudayr said: I did not hear Talhah ibn Ubaydullah narrating any tradition from the Apostle of Allah (PBUH) except one tradition. I (Rabi’ah ibn AbuAbdurRahman) asked: What is that? He said: We went out along with the Apostle of Allah (PBUH) who was going to visit the graves of the martyrs. When we ascended Harrah Waqim, and then descended from it, we found there some graves at the turning of the valley. We asked: Apostle of Allah, are these the graves of our brethren? He replied: Graves of our companions. When we came to the graves of martyrs, he said: These are the graves of our brethren.