(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".] (RU)
Reference (RU): Bulugh al-Maram 108 (RU)
In-book reference (RU): Book 1, Hadith 127 (RU)
English translation (RU): Book 1, Hadith 114 (RU)