Riyad as-Salihin 1026
'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] .
وعن عثمان بن عفان رضي الله عنه قال‏:‏ قال رسول الله صلى الله عليه وسلم‏:‏ ‏
"‏من توضأ فأحسن الوضوء، خرجت خطاياه من جسده حتى تخرج من تحت أظفاره‏"‏ ‏(‏‏(‏رواه مسلم‏)‏‏)‏‏.‏