Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) said that the Messenger of Allah (peace and blessings be upon him) married Sayyidah Maymunah (may Allah be pleased with her) while in the state of ihram. Amr (may Allah have mercy on him) said: I said to Jabir bin Zayd (may Allah have mercy on him): O Abu al-Sha'tha', who do you think she was? He said: I think she was Maymunah bint al-Harith (may Allah be pleased with her); and once he said that she was Maymunah bint al-Harith (may Allah be pleased with her). I said to him: Ibn Shihab (may Allah have mercy on him) narrates from Yazid bin al-Asamm (may Allah have mercy on him) that the Messenger of Allah (peace and blessings be upon him) married Sayyidah Maymunah (may Allah be pleased with her) while he was not in ihram.
(b) Yazid bin al-Asamm (may Allah have mercy on him) said that the Messenger of Allah (peace and blessings be upon him) married (her) while he was not in ihram.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 14203