The Prophet ﷺ said, "No servant conceals the faults of another in this world without Allah concealing his faults on the Day of Resurrection."
حدثنا خلف قال حدثنا ابن عياش عن سهيل عن أبيه
عن النبي ﷺ أنه قال لا يستر عبد عبدا في الدنيا إلا ستره الله يوم القيامة
Its chain is sahih. Muslim reported it, 4/2002, no. 2590, in the book of righteousness, as glad tidings that Allah conceals his fault, and Hakim reported something similar, 4/384, in the book of legal punishments, and he graded it sahih, and Dhahabi agreed with him.