It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "Whoever washes a deceased person and conceals his faults, Allah will conceal him from sins; and whoever shrouds him, Allah will clothe him with the silk of Paradise."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 8046