Narrated to us Affan, narrated to us Shu'bah, informed me Sulayman ibn 'Abd al-Rahman, he said: I heard Ubayd ibn Fayruz, a freed slave of Banu Shayban, that he asked al-Bara' about the sacrifices, and he mentioned the hadith.
Hadith Referenceمسند احمد / أول مسند الكوفيين / 18543