Muslim brother obligation on other Muslim Hadith Bukhari Muslim

Allah’s Messenger  Sallallāhu Alayhi Wasallam said: 

“A Muslim is a brother of Muslim, he neither wrongs him nor does hand him over to one who does him wrong. If anyone fulfils his brother’s needs, Allah will fulfil his needs; if one relieves a Muslim of his troubles, Allah will relieve his troubles on the Day of Resurrection.” (Al-Bukhari and Muslim)