A man from Banu Asad said: I saw Abu Bakr (may Allah be pleased with him) in the expedition of Dhat al-Salasil; his beard was red as though it were the flame of arfaj (a thorny shrub), and he was riding a light-coloured, greyish-white she-camel.
Hadith Referenceالمعجم الكبير للطبراني / العشرة / 24