عَنْ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا
قَالَتْ: «مَنْ حَدَّثَكُمْ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ يَبُولُ قَائِمًا فَلَا تُصَدِّقُوهُ مَا كَانَ يَبُول إِلَّا قَاعِدا»
Aishah said, “If anyone tells you that the Prophet (sallallahu alayhi wa sallam) used to pass water standing, do not believe him. He never passed water but when sitting.” Ahmad, Tirmidhi, and Nasai transmitted it.