I never saw the Messenger of Allah ﷺ come out from relieving himself without touching water.
حدثنا هناد بن السري حدثنا أبو الأحوص عن منصور عن إبراهيم عن الأسود
ما رأيت رسول الله ﷺ خرج من غائط قط إلا مس ماء
[Its chain is daif] Ibrahim Nakhai used to practice tadlis (Tabaqat al-Mudallisin, second tier) and narrated with an, meaning he did not explicitly state direct transmission.