The Messenger of Allah ﷺ forbade to urinate in stagnant water.  

عَنْ رَسُولِ اللَّهِ ﷺ أَنَّهُ نَهَى أَنْ يُبَالَ فِي الْمَاءِ الرَّاكِدِ  

the Messenger of Allah ﷺ said: None amongst you should urinate in standing water, and then wash in it.  

عَنِ النَّبِيِّ ﷺ قَالَ لاَ يَبُولَنَّ أَحَدُكُمْ فِي الْمَاءِ الدَّائِمِ ثُمَّ يَغْتَسِلُ مِنْهُ  

Of the ahadith narrated to us by Abfi Huraira from Muhammad the Messenger of Allah ﷺ one is this: The Messenger or Allah ﷺ said: You should not urinate in standing water, that is not flowing, then wash in it.  

عَنْ مُحَمَّدٍ رَسُولِ اللَّهِ ﷺ فَذَكَرَ أَحَادِيثَ مِنْهَا وَقَالَ رَسُولُ اللَّهِ ﷺ لاَ تَبُلْ فِي الْمَاءِ الدَّائِمِ الَّذِي لاَ يَجْرِي ثُمَّ تَغْتَسِلُ مِنْهُ