Al-Kāfi - The Book of Talaq (Divorces)

Al-Kāfi - The Book of Talaq (Divorces) Chapter: There Cannot be Divorce before Marriage ِنْ أَصْحَابِنَا عَنْ أَحْ٠َّدٍ وَ عَلِيُّ بْنُ إِبْرَاهِي٠َ عَنْ أَبِيهِ عَنْ عُثْ٠َانَ بْنِ عِيسَى عَنْ سَ٠َاعَةَ قَالَ سَأَلْتُهُ عَنِ الرَّجُلِ يَقُولُ يَوْ٠َ أَتَزَوَّجُ فُلَانَةَ فَهِيَ طَالِقٌ فَقَالَ لَيْسَ بِشَيْ‏ءٍ إِنَّهُ لَا يَكُونُ طَلَاقٌ حَتَّى يَ٠ْلِكَ عُقْدَةَ النِّكَاحِ.

He (the Imam) said, ‘It does not have any valid effect until he has a binding marriage.’” وثق - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (1/106))