Nasai

1؎: There is an apparent contradiction between the narrations of Hudhayfah and Umm al-Mu’minin A’ishah radi Allahu anhum, but the narration of Hudhayfah radi Allahu anhu is given preference because, in terms of chain of transmission, it is more authentic than the narration of A’ishah radi Allahu anha. And if both narrations are considered equal in authenticity, then the answer is that the negation by A’ishah radi Allahu anha does not invalidate the affirmation by Hudhayfah radi Allahu anhu, because the negation by Umm al-Mu’minin A’ishah radi Allahu anha is according to the extent of her knowledge. And there is no doubt that the general practice of the Prophet sallallahu alayhi wa sallam was that he would urinate sitting, and in order to clarify permissibility, he also urinated standing, as is established from the narration of Hudhayfah radi Allahu anhu.