Abu Rafi` Aslam (May Allah be pleased with him), the freed slave of the Messenger of Allah (ﷺ) reported:
The Messenger of Allah (ﷺ) said, "He who washes a dead body and conceals what he notices of physical defects, he will be forgiven forty times.''[Al-Hakim]. (DE)
App reference (DE): Book 7, Hadith 35 (DE)
Arabic/English book reference (DE): Book 7, Hadith 928 (DE)