The Prophet ﷺ said: None amongst you should urinate in standing water, then wash in it after sexual defilement. (Using translation from Abū Dāʾūd 70)
عَنِ النَّبِيِّ ﷺ قَالَ لَا يَبُلْ أَحَدُكُمْ فِي الْمَاءِ الدَّائِمِ وَلَا يَغْتَسِلْ فِيهِ مِنَ الْجَنَابَةِ