Sahih Muslim | Book 2 | Chapter 20

Narrated by Jabir
Jabir reported: The Messenger of Allah (may peace be upon him) forbade to urinate in stagnant water.

Narrated by Abu Huraira
Abu Huraira reported: the Messenger of Allah (may peace be upon him) said: None amongst you should urinate in standing water, and then wash in it.

Narrated by Hammam b. Munabbih
Hammam b. Munabbih said: Of the ahadith narrated to us by Abfi Huraira from Muhammad the Messenger of Allah (may peace be upon him) one is this: The Messenger or Allah (may peace be upon him) said: You should not urinate in standing water, that is not flowing, then wash in it.