Salim narrates from his father (Sayyiduna Abdullah bin Umar, may Allah be pleased with them both) that the Prophet Muhammad (peace and blessings be upon him) said: "A Muslim is the brother of another Muslim. He does not oppress him, nor does he abandon him. Whoever fulfills the need of his brother, Allah will fulfill his need. Whoever removes a difficulty from a Muslim, Allah will remove from him some of the difficulties of the Day of Resurrection. And whoever conceals the faults of a Muslim, Allah will conceal his faults on the Day of Resurrection."