Al-Kāfi - Volume 7 > The Testimony of an Accuser and an Ex-convict
Hadith #6

6- مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ ابْنِ مَحْبُوبٍ عَنِ ابْنِ سِنَانٍ قَالَ سَأَلْتُ أَبَا عَبْدِ اللهِ (عَلَيْهِ السَّلام) عَنِ الْمَحْدُودِ إِنْ تَابَ تُقْبَلُ شَهَادَتُهُ فَقَالَ إِذَا تَابَ وَتَوْبَتُهُ أَنْ يَرْجِعَ مِمَّا قَالَ وَيُكْذِبَ نَفْسَهُ عِنْدَ الإمَامِ وَعِنْدَ الْمُسْلِمِينَ فَإِذَا فَعَلَ فَإِنَّ عَلَى الإمَامِ أَنْ يَقْبَلَ شَهَادَتَهُ بَعْدَ ذَلِكَ.

6. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from ibn Mahbub from ibn Sinan who has narrated the following: “I once asked abu ‘Abd Allah, ‘Alayhi al-Salam, about the case of a man who is subjected to penalty; then he repents: if his testimony becomes acceptable. He (the Imam) said, ‘If he repents which is retracting what he has said and calls himself a liar before the Imam of the Muslims. When he does this then it is necessary for the Imam to accept his testimony thereafter .