If a person attests the honouroable record of a witness
باب إِذَا عَدَّلَ رَجُلٌ أَحَدًا فَقَالَ لاَ نَعْلَمُ إِلاَّ خَيْرًا
Sahih al-Bukhari, Book of Witnesses(view book)
Sahih al-Bukhari 2637
Narrated Urwa bin Al-Musayyab, Alqama bin Waqqas and Ubaidullah bin Abdullah: About the story of 'Aisha and their narrations were similar attesting each other, when the liars said what they invented about 'Aisha, and the Divine Inspiration was delayed, Allah's Apostle sent for 'Ali and Usama to consult them in divorcing his wife (i.e. 'Aisha). Usama said, "Keep your wife, as we know nothing about her except good." Buraira said, "I cannot accuse her of any defect except that she is still a young girl who sleeps, neglecting her family's dough which the domestic goats come to eat (i.e. she was too simpleminded to deceive her husband)." Allah's Apostle ﷺ said, "Who can help me to take revenge over the man who has harmed me by defaming the reputation of my family? By Allah, I have not known about my family-anything except good, and they mentioned (i.e. accused) a man about whom I did not know anything except good."
حَدَّثَنَا حَجَّاجٌ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ عُمَرَ النُّمَيْرِيُّ، حَدَّثَنَا يُونُسُ،. وَقَالَ اللَّيْثُ حَدَّثَنِي يُونُسُ، عَنِ ابْنِ شِهَابٍ، قَالَ أَخْبَرَنِي عُرْوَةُ، وَابْنُ الْمُسَيَّبِ، وَعَلْقَمَةُ بْنُ وَقَّاصٍ، وَعُبَيْدُ اللَّهِ، عَنْ حَدِيثِ، عَائِشَةَ ـ رضى الله عنها ـ وَبَعْضُ حَدِيثِهِمْ يُصَدِّقُ بَعْضًا، حِينَ قَالَ لَهَا أَهْلُ الإِفْكِ، فَدَعَا رَسُولُ اللَّهِ ﷺ عَلِيًّا وَأُسَامَةَ حِينَ اسْتَلْبَثَ الْوَحْىُ يَسْتَأْمِرُهُمَا فِي فِرَاقِ أَهْلِهِ، فَأَمَّا أُسَامَةُ فَقَالَ أَهْلُكَ وَلاَ نَعْلَمُ إِلاَّ خَيْرًا. وَقَالَتْ بَرِيرَةُ إِنْ رَأَيْتُ عَلَيْهَا أَمْرًا أَغْمِصُهُ أَكْثَرَ مِنْ أَنَّهَا جَارِيَةٌ حَدِيثَةُ السِّنِّ تَنَامُ عَنْ عَجِينِ أَهْلِهَا، فَتَأْتِي الدَّاجِنُ فَتَأْكُلُهُ. فَقَالَ رَسُولُ اللَّهِ ﷺ " مَنْ يَعْذِرُنَا مِنْ رَجُلٍ بَلَغَنِي أَذَاهُ فِي أَهْلِ بَيْتِي فَوَاللَّهِ مَا عَلِمْتُ مِنْ أَهْلِي إِلاَّ خَيْرًا، وَلَقَدْ ذَكَرُوا رَجُلاً مَا عَلِمْتُ عَلَيْهِ إِلاَّ خَيْرًا ".