وَقَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ : " لَا تَبُلْ فِي الْمَاءِ الدَّائِمِ الَّذِي لَا يَجْرِي ، ثُمَّ تَغْتَسِلْ مِنْهُ " .
And the Prophet Muhammad (peace be upon him) said: None of you should urinate in standing water and then use it to perform ablution.