Musnad Ahmad Hadith 21165

Abdullah narrated to us, he said: And Abu Ma'mar narrated to me, Ibrahim ibn Sa'd narrated to us, from Ibn Shihab, from Abu Bakr ibn Abd al-Rahman, from Marwan ibn al-Hakam, from Abd al-Rahman ibn al-Aswad ibn Abd Yaghuth, from Ubayy ibn Ka'b, from the Prophet, peace and blessings be upon him, and he mentioned the hadith. Abu Abd al-Rahman said: Thus Abu Ma'mar narrated it to us, from Ibrahim ibn Sa'd, and he said in it: from Abd al-Rahman ibn al-Aswad. And Abu Ma'mar differed from the narration of those who narrated it from Ibrahim ibn Sa'd, because a number narrated it from Ibrahim ibn Sa'd, and they said in it: from Abdullah ibn al-Aswad.