رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 240
The Book of Miscellany
Covering Faults of the Muslims
وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: لاَ يَسْتُرُ عَبْدٌ عَبْدًا فِي الدُّنْيَا إِلاَّ سَتَرَهُ اللَّهُ يَوْمَ الْقِيَامَةِ ((رَوَاهُ مُسْلِم)).
Abu Hurairah (May Allah be pleased with him) reported: The Prophet (ﷺ) said, "Allah will cover up on the Day of Resurrection the defects (faults) of the one who covers up the faults of the others in this world". [Muslim].
Riyad as-Salihin, 240