Ibrahim Nakha'i (may Allah have mercy on him) was asked: What if a woman becomes pregnant by another husband? Ibrahim (may Allah have mercy on him) remained silent and did not answer.
Hadith Referenceسنن سعید بن منصور / كتاب النكاح / 1880
Hadith Takhrij«أخرجه سعيد بن منصور فى «سننه» ترقيم الدرالسلفية برقم:، 701، 703»