Ṣaḥīḥ Muslim Ḥadīth [2580]

حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا لَيْثٌ، عَنْ عُقَيْلٍ، عَنِ الزُّهْرِيِّ، عَنْ سَالِمٍ ، عَنْ أَبِيهِ، أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ، قَالَ: الْمُسْلِمُ أَخُو الْمُسْلِمِ، لَا يَظْلِمُهُ وَلَا يُسْلِمُهُ، مَنْ كَانَ فِي حَاجَةِ أَخِيهِ كَانَ اللَّهُ فِي حَاجَتِهِ، وَمَنْ فَرَّجَ عَنْ مُسْلِمٍ كُرْبَةً، فَرَّجَ اللَّهُ عَنْهُ بِهَا كُرْبَةً مِنْ كُرَبِ يَوْمِ الْقِيَامَةِ، وَمَنْ سَتَرَ مُسْلِمًا سَتَرَهُ اللَّهُ يَوْمَ الْقِيَامَةِ

Book [45]: The book of virtue, enjoining good manners, and joining of the ties of kinship
Chapter [15]: The prohibition of oppression

Ḥadīth [2580]: Sālim reported on the authority of his father (‘Abdullāh ibn ‘Umar) that Allāh’s Messenger (peace and blessings of Allāh be upon him) said: “A Muslim is the brother of a fellow-Muslim. He should neither commit oppression upon him nor ruin him, and he who meets the need of a brother, Allāh would meet big needs, and he who relieved a Muslim from hardship Allāh would relieve him from the hardships to which he would be put on the Day of Resurrection, and he who did not expose (the faults of a Muslim) Allāh would conceal his faults on the Day of Resurrection.”