'Uthman bin 'Affan (May Allah be pleased with him) reported:
The Messenger of Allah (ﷺ) said, "He who performs the Wudu' perfectly (i.e., according to Sunnah), his sins will depart from his body, even from under his nails."[Muslim].
App reference: Book 9, Hadith 36
Arabic/English book reference: Book 9, Hadith 1026