Al-Kāfi - Volume 6 > One Who is not Lawful for her Husband without Marriage to another Man
Hadith #4

صَفْوَانُ عَنْ مُوسَى بْنِ بَكْرٍ عَنْ زُرَارَةَ عَنْ أَبِي جَعْفَرٍ ( عليه السلام ) فِي الرَّجُلِ يُطَلِّقُ امْرَأَتَهُ تَطْلِيقَةً ثُمَّ يُرَاجِعُهَا بَعْدَ انْقِضَاءِ عِدَّتِهَا فَإِذَا طَلَّقَهَا الثَّالِثَةَ لَمْ تَحِلَّ لَهُ حَتَّى تَنْكِحَ زَوْجاً غَيْرَهُ فَإِذَا تَزَوَّجَهَا غَيْرُهُ وَ لَمْ يَدْخُلْ بِهَا وَ طَلَّقَهَا أَوْ مَاتَ عَنْهَا لَمْ تَحِلَّ لِزَوْجِهَا الْأَوَّلِ حَتَّى يَذُوقَ الْآخَرُ عُسَيْلَتَهَا .

4. Safwan has narrated from Musa ibn Bakr from Zurarah who has said the following: “Abu Ja‘far, ‘Alayhi al-Salam, has said, ‘If a man divorces his wife once then goes back to her after her waiting period is complete, when he divorces her for the third time she cannot become lawful for him in marriage until she marries another man. If another man marries her then divorces her but does not go to bed with her or dies, she does not become lawful for her previous husband until another man tastes her honey (goes to bed after a marriage with her).”’