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