´Maimunah bint Harith narrated:` that the Messenger of Allah married her when he was Halal (not in Ihram). (Sahih).He (one of the narrators-Yazid) said: "And she was my maternal aunt and the maternal aunt of Idn 'Abbas also."
Hadith ReferenceSunan Ibn Majah / The Chapters on Marriage / Hadith: 1964
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح مسلم