مسند اسحاق بن راهويه
Musnad Ishaq Bin Rahwiya
كتاب النكاح و الطلاق
Book of Marriage and Divorce
If a woman accepts Islam before her husband, they cannot maintain relations
Hadith Number: 651
اخبرنا یحیی بن واضح، نا محمد بن اسحاق، بهذا الاسناد مثله، وزاد قال: ولم یحدث شیئا، وکان رسول اللٰه صلی اللٰه علیه وسلم قد ضمها الیه قبل ذٰلك.
Muhammad bin Ishaq narrated with this chain the same narration, and he transmitted this addition: He said, "No new act was done (i.e., neither a new marriage nor a new dowry, etc.), and the Messenger of Allah (peace and blessings be upon him) had already kept her with him before this."
تخریج الحدیث: «انظر ما قبله»