كتاب الطهارة
3  
Purification
(3b)
Chapter: How to act when relieving oneself - Section 2
(2)
باب آداب الخلاء - الفصل الثاني
Mishkat al-Masabih 349
She also reported God’s messenger as saying, “When one of you goes to relieve himself he should take with him three stones with which to cleanse himself, for they will be enough for him.” Ahmad, Abu Dawud, Nasa’i and Darimi transmitted it.
وَعَنْهَا قَالَتْ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «إِذَا ذَهَبَ أَحَدُكُمْ إِلَى الْغَائِطِ فَلْيَذْهَبْ مَعَهُ بِثَلَاثَةِ أَحْجَارٍ يَسْتَطِيبُ بِهِنَّ فَإِنَّهَا تُجْزِئُ عَنْهُ» . رَوَاهُ أَحْمَدُ وَأَبُو دَاوُدَ وَالنَّسَائِيُّ وَالدَّارِمِيُّ
  حَسَنٌ   (الألباني) حكم   :
Reference : Mishkat al-Masabih 349
In-book reference : Book 3, Hadith 61