Al-Kāfi - Volume 7 > The Testimony of an Accuser and an Ex-convict
Hadith #5

5- عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنْ إِسْمَاعِيلَ بْنِ مَرَّارٍ عَنْ يُونُسَ عَنْ بَعْضِ أَصْحَابِهِ عَنْ أَبِي عَبْدِ اللهِ (عَلَيْهِ السَّلام) قَالَ سَأَلْتُهُ عَنِ الَّذِي يَقْذِفُ الْمُحْصَنَاتِ تُقْبَلُ شَهَادَتُهُ بَعْدَ الْحَدِّ إِذَا تَابَ قَالَ نَعَمْ قُلْتُ وَمَا تَوْبَتُهُ قَالَ يَجِي‏ءُ وَيُكْذِبُ نَفْسَهُ عِنْدَ الإمَامِ وَيَقُولُ قَدِ افْتَرَيْتُ عَلَى فُلانَةَ وَيَتُوبُ مِمَّا قَالَ.

5. Ali ibn Ibrahim has narrated from his father from Tsma‘il ibn Marrar from Yunus from certain persons of his people who has narrated the following: “I once asked abu ‘Abd Allah, ‘Alayhi al-Salam, about the case of a man who accuses married woman: if his testimony after his being subjected to penalty and his repenting is admissible. He (the Imam) said, ‘Yes, it is admissible . 5 I then asked, ‘What is his repentance ? 5 He (the Imam) said, ‘He comes before the Imam and calls his soul a liar and says that he had fabricated against so and so and retracts what he had said , 555