Ibn al-Musayyib reported: Three men testified against Al-Mughirah that he had committed adultery, while an additional witness abstained. Umar, may Allah be pleased with him, punished the three men and he said to them, “Repent and I will accept your testimony.” Two men repented and Abu Bakrah did not repent, so Umar did not accept his testimony.
Source: Muṣannaf ‘Abd al-Razzāq 13564
Al-Bukhari said, “Umar flogged Abu Bakrah, Shibl ibn Ma’bad, and Nafi’ because of their accusation against Al-Mughirah, then he demanded their repentance. He said that whoever repents, his testimony would be accepted. It was permitted by Abdullah ibn ‘Utaybah, Umar ibn Abdul Aziz, Sa’id ibn Jubayr, Tawus, Mujahid, Al-Sha’bi, ‘Ikramah, Al-Zuhri, Muharib ibn Ditar, Shurayh, and Mu’awiyyah ibn Qurrah.”
Source: Ṣaḥīḥ al-Bukhārī 3/170
عَنِ ابْنِ الْمُسَيِّبِ قَالَ شَهِدَ عَلَى الْمُغِيرَةِ بْنِ شُعْبَةَ ثَلَاثَةٌ بِالزِّنَا وَنُكِّلَ زِيَادٌ فَحَدَّ عُمَرُ رضي الله عنه الثَّلَاثَةَ وَقَالَ لَهُمْ تُوبُوا تُقْبَلْ شَهَادَتُكُمْ فَتَابَ رَجُلَانِ وَلَمْ يَتُبْ أَبُو بَكْرَةَ فَكَانَ لَا يَقْبَلُ شَهَادَتَهُ
13564 مصنف عبد الرزاق الصنعاني
قال البخاري وَجَلَدَ عُمَرُ أَبَا بَكْرَةَ وَشِبْلَ بْنَ مَعْبَدٍ وَنَافِعًا بِقَذْفِ المُغِيرَةِ ثُمَّ اسْتَتَابَهُمْ وَقَالَ مَنْ تَابَ قَبِلْتُ شَهَادَتَهُ وَأَجَازَهُ عَبْدُ اللَّهِ بْنُ عُتْبَةَ وَعُمَرُ بْنُ عَبْدِ العَزِيزِ وَسَعِيدُ بْنُ جُبَيْرٍ وَطَاوُسٌ وَمُجَاهِدٌ وَالشَّعْبِيُّ وَعِكْرِمَةُ وَالزُّهْرِيُّ وَمُحَارِبُ بْنُ دِثَارٍ وَشُرَيْحٌ وَمُعَاوِيَةُ بْنُ قُرَّةَ
3/170 صحيح البخاري باب شهادة القاذف والسارق والزاني