Al-Kāfi - Volume 6 > One Who is not Lawful for her Husband without Marriage to another Man
Hadith #2

عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ سَهْلِ بْنِ زِيَادٍ عَنِ ابْنِ أَبِي نَصْرٍ وَ حُمَيْدُ بْنُ زِيَادٍ عَنِ ابْنِ سَمَاعَةَ عَنْ جَعْفَرِ بْنِ سَمَاعَةَ وَ عَلِيِّ بْنِ خَالِدٍ عَنْ عَبْدِ الْكَرِيمِ عَنْ أَبِي بَصِيرٍ عَنْ أَبِي عَبْدِ اللَّهِ ( عليه السلام ) قَالَ قُلْتُ لَهُ الْمَرْأَةُ الَّتِي لَا تَحِلُّ لِزَوْجِهَا حَتَّى تَنْكِحَ زَوْجاً غَيْرَهُ قَالَ هِيَ الَّتِي تُطَلَّقُ ثُمَّ تُرَاجَعُ ثُمَّ تُطَلَّقُ ثُمَّ تُرَاجَعُ ثُمَّ تُطَلَّقُ فَهِيَ الَّتِي لَا تَحِلُّ لَهُ حَتَّى تَنْكِحَ زَوْجاً غَيْرَهُ وَ قَالَ الرَّجْعَةُ بِالْجِمَاعِ وَ إِلَّا فَإِنَّمَا هِيَ وَاحِدَةٌ .

2. A number of our people have narrated from Sahl ibn Ziyad from ibn abu and Humayd ibn Ziyad from ibn Sama‘ah from Ja‘far ibn Sama‘ah and Ali ibn Khalid from ‘Abd al-Karim from abu Basir who has said the following: “I once asked abu ‘Abd Allah, ‘Alayhi al-Salam, about the case of a woman who cannot become lawful in marriage for her previous husband without marriage with another man. He (the Imam) said, ‘She is a woman who is divorced, then her husband goes back to her, then is divorced then he goes back to her, then is divorced. She becomes unlawful for him in marriage unless she marries another man.’ He (the Imam) said that going back to her must be for going to bed with her, otherwise, it is only one divorce.’”