Sayyiduna Ibn Abbas (may Allah be pleased with them both) said: The Messenger of Allah (peace and blessings be upon him) married Sayyidah Maymunah (may Allah be pleased with her) while he was in the state of ihram.
Imam al-Tabarani (may Allah have mercy on him) said: Mu'awiyah bin Hisham narrated it like this, whereas the other students of al-Thawri narrated it from al-Thawri, from Amr bin Dinar, from Jabir bin Zayd, from Ibn Abbas (may Allah be pleased with them both), and that is the correct one.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 12495