It is narrated from Sayyiduna Ka'b bin Ujrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever relieves a believer of a hardship, Allah will relieve him of a hardship on the Day of Resurrection; whoever conceals a believer's faults, Allah will conceal his faults; and whoever eases a difficulty for a believer, Allah will ease a difficulty for him."
Hadith Referenceالمعجم الكبير للطبراني / باب الكاف / 16399