Al-Kāfi - Volume 6 > Al-Khul* (Divorce for Payment)
Hadith #10

عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ بَعْضِ أَصْحَابِهِ عَنْ أَبِي عَبْدِ اللَّهِ ( عليه السلام ) قَالَ فِي الْمُخْتَلِعَةِ إِنَّهَا لَا تَحِلُّ لَهُ حَتَّى تَتُوبَ مِنْ قَوْلِهَا الَّذِي قَالَتْ لَهُ عِنْدَ الْخُلْعِ .

10. Ali ibn Ibrahim has narrated from his father from ibn abu ‘Umayr from certain persons of his people who has said the following: “Abu ‘Abd Allah, ‘Alayhi al-Salam, has said that a woman involved in al-Khul‘ cannot become lawful for him until she repents because of her statements that she has expressed when proceeding for al- Khul S’”