It is narrated from the Mother of the Believers, Sayyidah Aishah (may Allah be pleased with her), that the Prophet (peace and blessings be upon him) freed Sayyidah Safiyyah (may Allah be pleased with her), made her freedom her dowry (mahr), and then married her.
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Ayyub (may Allah have mercy on him) except Hammad bin Zayd, and Yunus al-Mu'addib is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الميم / 5642
Hadith Takhrij«أخرجه ابن ماجه فى «سننه» برقم: 1958، والدارقطني فى «سننه» برقم: 3739، 3740، والطبراني فى «الأوسط» برقم: 2099»