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 hand him over to an enemy. 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. And whoever conceals the faults of a Muslim, Allah will conceal his faults on the Day of Resurrection."

Muslim 6578

Sahih

حدثنا قتيبة بن سعيد حدثنا ليث عن عقيل عن الزهري

عن سالم عن أبيه

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

مسلم 6578صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Muslim
Book
Righteousness, maintaining ties, and good manners
Chapter
Prohibition of injustice
Numbering
Darussalam 6578
Muslim 6578