Abdullah bin Umar reported,

The Messenger of Allah ﷺ said, "A Muslim is the brother of another Muslim. He does not wrong him, nor does he abandon him. Whoever attends to the need of his brother, Allah will attend to his need. Whoever relieves a Muslim of a hardship, Allah will relieve him of one of the hardships of the Day of Resurrection. Whoever conceals the faults of a Muslim, Allah will conceal his faults on the Day of Resurrection."

Azami 13348

Sahih

عن عبد الله بن عمر

أن رسول الله ﷺ قال: المسلم أخو المسلم لا يظلمه ولا يسلمه، ومن كان في حاجة أخيه كان الله في حاجته، ومن فرج عن مسلم كربة فرج الله عنه كربة من كربات يوم القيامة، ومن ستر مسلما ستره الله يوم القيامة.

الأعظمي 13348صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Tafsir of the great Quran
Chapter
Tafsir of Surah Hujurat
Section
His saying, "And if two factions among the believers fight, then make settlement between them. But if one of them oppresses the other, then fight against the one that oppresses until it returns to the ordinance of Allah. And if it returns, then make settlement between them in justice and act justly. Indeed, Allah loves those who act justly. The believers are but brothers, so make settlement between your brothers and fear Allah that you may receive mercy."
Numbering
Jami al-Kamil 13348 (2nd edition)
Azami 13348