Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
65/48.5. Chapter:
The Statement of Allah the Most High: "...When they gave their Bai'a (pledge) to you (O Muḥammad pbuh) under the tree..." (V.48:18)
Sahih Bukhari
وَعَنْ عُقْبَةَ بْنِ صُهْبَانَ، قَالَ سَمِعْتُ عَبْدَ اللَّهِ بْنَ الْمُغَفَّلِ الْمُزَنِيِّ، فِي الْبَوْلِ فِي الْمُغْتَسَلِ.
`Abdullah bin Al-Mughaffal Al-Muzani also said: "The Prophet (ﷺ) also forbade urinating at the place where one takes a bath."
Reference : Sahih al-Bukhari 4842In-book reference : Book 65, Hadith 363USC-MSA web (English) reference : Vol. 6, Book 60, Hadith 365