عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «لَا يَبُولَنَّ أَحَدُكُمْ فِي الْمَاءِ الدَّائِمِ الَّذِي لَا يجْرِي ثمَّ يغْتَسل فِيهِ» وَفِى رِوَايَةٍ لِمُسْلِمٍ قَالَ: «لَا يَغْتَسِلُ أَحَدُكُمْ فِي الْمَاءِ الدَّائِمِ وَهُوَ جُنُبٌ» . قَالُوا: كَيْفَ يَفْعَلُ يَا أَبَا هُرَيْرَةَ؟ قَالَ: يَتَنَاوَلُهُ تَنَاوُلًا
Translation
As-Sa'ib b. Yazid said

My maternal aunt took me to the Prophet and said, “My nephew is ill.” So he wiped my head, invoked a blessing on me, then performed ablution, and I drank some of the water he had used. Then I stood up behind his back and looked at the seal of prophecy between his shoulders, like the button on a bride’s pavilion.(Bukhari and Muslim.)