Al-Kāfi - The Book of Marriage

Al-Kāfi - The Book of Marriage Chapter: Women who Become Unlawful for Marriage Forever ِنْ أَصْحَابِنَا عَنْ أَحْ٠َّدٍ رَفَعَهُ أَنَّ الرَّجُلَ إِذَا تَزَوَّجَ الْ٠َ أَنَّ لَهَا زَوْجاً فُرِّقَ بَيْنَهُ٠ْ تَحِلَّ لَهُ أَبَداً. 11.

A number of our people have narrated from Ahmad ibn Muhammad in a marfu’ manner has said the following: “He (the Imam) (a.s.), has said, ‘If a man marries a woman and knows that she has a husband, they must separate from each other and she becomes unlawful for him forever.’” رفوع - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (0/189))