مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 349
Purification
How to act when relieving oneself - Section 2
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
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.
Mishkat al-Masabih, 349حَسَنٌ (الألباني)