(7) باب قضاء الحاجة
and its Asl (original source) is in Abu Da'ud and At-Tirmidhi and Ibn Khuzaima graded it Sahih (sound) through Abu Huraira (rad) without mentioning the "stones".] (PT)
Reference (PT): Bulugh al-Maram 108 (PT)
In-book reference (PT): Book 1, Hadith 127 (PT)
English translation (PT): Book 1, Hadith 114 (PT)