Where does it say that any part of hands is left dry during wudu invalidates it

Is it in Quran or authentic hadith that during our ablution/wudu, if we leave any part (even a centimeter) of our hands dry, the wudu becomes invalid or less reward-worthy? If so, please share the verse from Quran and/or authentic hadith reference. I am confused about nailpaint matter. I want to prioritize and follow Allah InshaAllah but also want to look presentable and enjoy, as much as is permissible.