Hadith 534
Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates this statement of the Prophet Muhammad (peace and blessings be upon him): "Whoever conceals the faults of his Muslim brother, Allah Almighty will conceal his faults in this world and the Hereafter. And whoever relieves a Muslim of a difficulty, Allah Almighty will relieve him of the difficulties of the Day of Judgment. And Allah Almighty remains engaged in helping the servant as long as the servant is engaged in helping his brother."