It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that indeed the Messenger of Allah (peace and blessings be upon him) said: "A Muslim is the brother of a Muslim; he does not oppress him nor does he let him be oppressed, and whoever fulfills the need of his brother, Allah fulfills his need."
Hadith Referenceمسند الشهاب / 477
Hadith Gradingمحدثین:إسناده صحيح
Hadith Takhrij«إسناده صحيح ، وأخرجه البخاري : 2442، ومسلم : 2580، و أبو داود : 4893، و ترمذي : 1426»