Sahih Muslim , Book 45, Hadith 93 (In-Book) ⓘ
Abu Huraira reported Allah's Apostle as saying: The servant (who conceals) the faults of others in this world, Allah would conceal his faults on the Day of Resurrection.
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عَفَّانُ، حَدَّثَنَا وُهَيْبٌ، حَدَّثَنَا سُهَيْلٌ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " لاَ يَسْتُرُ عَبْدٌ عَبْدًا فِي الدُّنْيَا إِلاَّ سَتَرَهُ اللَّهُ يَوْمَ الْقِيَامَةِ " .
also referenced under: Hadith 2590 (Reference) & Book 32, Hadith 6267 (USC-MSA)