Al-Kāfi - Volume 5 > Female fornicator
Hadith #2

2- عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ إِسْحَاقَ بْنِ أَبِي الْهِلالِ عَنْ أَبِي عَبْدِ اللهِ (عَلَيْهِ السَّلام) قَالَ قَالَ أَمِيرُ الْمُؤْمِنِينَ (عَلَيْهِ السَّلام) أَلا أُخْبِرُكُمْ بِكِبْرِ الزِّنَا قَالُوا بَلَى قَالَ هِيَ امْرَأَةٌ تُوطِئُ فِرَاشَ زَوْجِهَا فَتَأْتِي بِوَلَدٍ مِنْ غَيْرِهِ فَتُلْزِمُهُ زَوْجَهَا فَتِلْكَ الَّتِي لا يُكَلِّمُهَا اللهُ وَلا يَنْظُرُ إِلَيْهَا يَوْمَ الْقِيَامَةِ وَلا يُزَكِّيهَا وَلَهَا عَذَابٌ أَلِيمٌ.

2. Ali ibn Ibrahim has narrated from his father from ibn abu ‘Umayr from Ishaq ibn abu Hilal who has said the following: “Abu ‘Abd Allah, ‘Alayhi al-Salam, has said that ’Amir al-Mu’minin once said, ‘Can I tell you about how great the sin of fornication is?’ They replied, ‘Yes, please tell us about it.’ He (the Imam) said, ‘It is a woman who allows someone other than her husband to go to bed with her; then gives birth thereby to a child and makes her husband responsible for the child. This is the woman to whom Allah does not speak and will not look to her on the Day of Judgment, will not purify her and she will suffer a painful suffering.’”