It was narrated from Jabir that the Messenger of Allah (ﷺ) forbade urinating into standing water.
Sunan an-Nasa'i Book 1, Hadith 35
← Previous Hadith "None of you should urinate into a burrow in the ground." They said to Qatadah: "Why is it disliked to urinate into a burrow in the ground?" He said: "It is said that these are dwelling-places of the jinn."

Sunan an-Nasa'i Book 1, Hadith 34 Next Hadith → "None of you should urinate in the place where he bathes, for most Waswas (devilish whispers) come from that."

I.e., with regard to whether the urine has soiled his body or not.

Sunan an-Nasa'i Book 1, Hadith 36