"When any one of you goes to the Gha'it (toilet to defecate), let him take with him three stones and clean himself with them, for that will suffice him." (Using translation from Nasāʾī 44)  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ «إِذَا ذَهَبَ أَحَدُكُمُ الْغَائِطَ فَلْيَذْهَبْ مَعَهُ بِثَلَاثَةِ أَحْجَارٍ فَلْيَسْتَطِبْ بِهَا فَإِنَّهَا تُجْزِئُ عَنْهُ»