Maymun bin Mihran (may Allah have mercy on him) narrates: I came to Sayyidah Safiyyah bint Shaybah (may Allah be pleased with her) and asked her: "Did the Messenger of Allah (peace and blessings be upon him) marry Sayyidah Maymunah (may Allah be pleased with her) while he (peace and blessings be upon him) was in ihram?" She said: "No, rather he (peace and blessings be upon him) married her when they were both halal (that is, not in ihram)."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Abd al-Karim (may Allah have mercy on him) except Khattab (may Allah have mercy on him)."
Hadith Referenceالمعجم الأوسط / باب الألف / 1091
Hadith Takhrij«أخرجه النسائي فى «السنن الكبرى» برقم: 5382، والبيهقي فى «السنن الكبرى» برقم: 14321، والطبراني فى «الكبير» برقم: 46، 814، والطبراني فى «الأوسط» برقم: 4719»