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