It is narrated from Hasan bin Muhammad (may Allah have mercy on him) that the son of Sayyiduna Ali (may Allah be pleased with him) married two paternal cousins, and neither party was aware of this marriage. The women were confused about whom to stay with. Hasan bin Muhammad (may Allah have mercy on him) said: "We preferred this marriage out of the two."
Hadith Referenceسنن سعید بن منصور / كتاب النكاح / 1834
Hadith Takhrij«أخرجه سعيد بن منصور فى «سننه» ترقيم الدرالسلفية برقم:، 657، والبيهقي فى«سننه الكبير» برقم: 14065، وابن أبى شيبة فى «مصنفه» برقم: 17041»