Sunan an-Nasa'i 29
Sahih Graded by Abu Ghuddah Book of The Book of Purification · Hadith 29 of 5,758أَخْبَرَنَا عَلِيُّ بْنُ حُجْرٍ، قَالَ أَنْبَأَنَا شَرِيكٌ، عَنِ الْمِقْدَامِ بْنِ شُرَيْحٍ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، قَالَتْ مَنْ حَدَّثَكُمْ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم بَالَ قَائِمًا فَلاَ تُصَدِّقُوهُ مَا كَانَ يَبُولُ إِلاَّ جَالِسًا .
Narrated by Aishah said
It was narrated that 'Aishah said:"Whoever tells you that the Messenger of Allah (ﷺ) urinated standing up, do not believe him, for he would not urinate except while squatting
References
Sunan an-Nasa'i 29
In-book: Book 1, Hadith 29 Source: hadith-api (fawazahmed0)