Abu Huraira reported Allah's Messenger (may peace be upon him) as saying: He who alleviates the suffering of a brother out of the sufferings of the world, Allah would alleviate his suffering from the sufferings of the Day of Resurrection, and he who finds relief for one who is hard pressed, Allah would make things easy for him in the Hereafter, and he who conceals (the faults) of a Muslim, Allah would conceal his faults in the world and in the Hereafter. Allah supports His slave as long as the slave is supportive of his brother
Book: Saheeh Muslim