Hadith 1772
Jabir (May Allah be pleased with him) said:
عن جابر رضي الله عنه : أن رسول الله صلى الله عليه وسلم نهى أن يبال في الماء الراكد. رواه مسلم
The Messenger of Allah (ﷺ) forbade urinating into stagnant water. [Muslim].
In plain words
The Prophet forbade urinating into still water. It teaches care for a resource the whole community drinks from and uses, not spoiling a shared good.
Reference : Riyad as-Salihin 1772 In-book reference : Book 17, Hadith 262