Sahih al-Bukhari · Hadith 4842

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