Sahih Muslim Book 2, Hadith Number 554.
Chapter : It is forbidden to urinate in stagnant water.
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.
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.