Hadith 16679

Chapter 68

باب 68

(68) باب الْبَوْلِ فِي الْمَاءِ الدَّائِمِ

(68) Chapter: Urinating in stagnant water
وَبِإِسْنَادِهِ قَالَ " لاَ يَبُولَنَّ أَحَدُكُمْ فِي الْمَاءِ الدَّائِمِ الَّذِي لاَ يَجْرِي، ثُمَّ يَغْتَسِلُ فِيهِ ".

The same narrator said that the Prophet (ﷺ) had said:
"You should not pass urine in stagnant water which is not flowing then (you may need to) wash in it."

Reference: Sahih al-Bukhari 239

In-book reference: Book 4, Hadith 106

USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 4, Hadith 240