Musnad Ahmad 1156:116

Ya'qub narrated to us, he said: My father narrated to us, from Ibn Ishaq, he said: Muhammad ibn Ja'far ibn al-Zubayr narrated to me, from Yazid ibn Ruman, from Khalid, the freed slave of al-Zubayr ibn Nawfal, he said: Zaynab bint Abi Salamah narrated to me, from her mother, Umm Salamah, this hadith.