Allah's Messenger (ﷺ) said, "A Muslim is a brother of another Muslim, so he should not oppress him, nor should he hand him over to an oppressor. Whoever fulfilled the needs of his brother, Allah will fulfill his needs; whoever brought his (Muslim) brother out of a discomfort, Allah will bring him out of the discomforts of the Day of Resurrection, and whoever screened a Muslim, Allah will screen him on the Day of Resurrection . "
Sahih al-Bukhari Book 46, Hadith 3
← Previous Hadith While I was walking with Ibn `Umar holding his hand, a man came in front of us and asked, "What have you heard from Allah's Messenger (ﷺ) about An-Najwa?" Ibn `Umar said, "I heard Allah's Messenger (ﷺ) saying, 'Allah will bring a believer near Him and shelter him with His Screen and ask him: Did you commit such-and-such sins? He will say: Yes, my Lord. Allah will keep on asking him till he will confess all his sins and will think that he is ruined. Allah will say: 'I did screen your sins in the world and I forgive them for you today', and then he will be given the book of his good deeds. Regarding infidels and hypocrites (their evil acts will be exposed publicly) and the witnesses will say: These are the people who lied against their Lord. Behold! The Curse of Allah is upon the wrongdoers." (11.18)

Sahih al-Bukhari Book 46, Hadith 2 Next Hadith → Allah's Messenger (ﷺ) said, "Help your brother, whether he is an oppressor or he is an oppressed one."

Sahih al-Bukhari Book 46, Hadith 4