Sahih Bukhari
Prophetic Commentary on the Quran (Tafseer of the Prophet (PBUH))
Volume: 006 / Book Number: 060 / Hadith Number: 365
Narrated 'Uqba bin Sahban:
'Abdullah bin Mughaffal Al-Muzani who was one of those who witnessed (the event of) the tree, said, "The Prophet forbade the throwing of small stones (with two fingers)." 'Abdullah bin Al-Mughaffal Al-Muzani also said, "The Prophet also forbade urinating at the place where one takes a bath."