"The Messenger of Allah said: 'I am to you like a father to his son, and I teach you. So when you go to relieve yourselves, do not face the Qiblah or turn your backs towards it.' He ordered us to use three pebbles, and he forbade us to use dung and bones, and he forbade cleaning oneself with the right hand."  

قَالَ رَسُولُ اللَّهِ ﷺ إِنَّمَا أَنَا لَكُمْ مِثْلُ الْوَالِدِ لِوَلَدِهِ أُعَلِّمُكُمْ إِذَا أَتَيْتُمُ الْغَائِطَ فَلاَ تَسْتَقْبِلُوا الْقِبْلَةَ وَلاَ تَسْتَدْبِرُوهَا وَأَمَرَ بِثَلاَثَةِ أَحْجَارٍ وَنَهَى عَنِ الرَّوْثِ وَالرِّمَّةِ وَنَهَى أَنْ يَسْتَطِيبَ الرَّجُلُ بِيَمِينِهِ  

"The Messenger of Allah went to the toilet and said: 'Bring me three stones.' So I brought him two stones and a piece of dung. He took the two stones and threw the dung away, saying: 'It is impure.'"  

أَنَّ رَسُولَ اللَّهِ ﷺ أَتَى الْخَلاَءَ فَقَالَ ائْتِنِي بِثَلاَثَةِ أَحْجَارٍ فَأَتَيْتُهُ بِحَجَرَيْنِ وَرَوْثَةٍ فَأَخَذَ الْحَجَرَيْنِ وَأَلْقَى الرَّوْثَةَ وَقَالَ هِيَ رِجْسٌ  

"The Messenger of Allah said: 'For cleaning yourself you need three stones, no one of them being dung.'"  

قَالَ رَسُولُ اللَّهِ ﷺ فِي الاِسْتِنْجَاءِ ثَلاَثَةُ أَحْجَارٍ لَيْسَ فِيهَا رَجِيعٌ  

"I see that your companion (the Prophet) is teaching you everything, even how to relieve yourselves?" He said: "Yes indeed. He has ordered us not to face the Qiblah (prayer direction) nor to clean ourselves with our right hands, and not to be content with anything less than three stones, which are not to include any excrement or bones."  

لَهُ بَعْضُ الْمُشْرِكِينَ وَهُمْ يَسْتَهْزِئُونَ بِهِ إِنِّي أَرَى صَاحِبَكُمْ يُعَلِّمُكُمْ كُلَّ شَىْءٍ حَتَّى الْخِرَاءَةِ قَالَ أَجَلْ أَمَرَنَا أَنْ لاَ نَسْتَقْبِلَ الْقِبْلَةَ وَأَنْ لاَ نَسْتَنْجِيَ بِأَيْمَانِنَا وَلاَ نَكْتَفِيَ بِدُونِ ثَلاَثَةِ أَحْجَارٍ لَيْسَ فِيهَا رَجِيعٌ وَلاَ عَظْمٌ