Maymun bin Mihran states: I came to Sayyidah Safiyyah bint Shaybah (may Allah be pleased with her); she was an elderly woman. I asked her: "Did the Prophet (peace and blessings be upon him) marry Sayyidah Maymunah (may Allah be pleased with her) while in the state of ihram?" She replied: "No! When the Prophet (peace and blessings be upon him) married her, both of them were out of ihram."
Al-Tabarani recorded it in al-Mu'jam al-Kabir and al-Mu'jam al-Awsat; the narrators of al-Kabir are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب النكاح / 7414