Sunan an-Nasa'i, 36

It was narrated from 'Abdullah bin Mughaffal that the Prophet (ﷺ) said:"None of you should urinate in the place where he bathes, for most Waswas (devilish whispers) [1] come from that." [1] I.e., with regard to whether the urine has soiled his body or not

Rapporté par 'Abdullah bin Mughaffal : Le Prophète (ﷺ) a dit : "Aucun de vous ne doit uriner à l’endroit où il se lave, car la plupart des murmures diaboliques viennent de là