Source text
وَيُسَنُّ أَنْ يَسْتَنْجِيَ بِحَجَرٍ مُنْقٍ وَنَحْوِهِ، وَالْغَسْلُ بِالْمَاءِ أَحَبُّ، وَالْأَفْضَلُ الْجَمْعُ بَيْنَ الْمَاءِ وَالْحَجَرِ ... وَالسُّنَّةُ إِنْقَاءُ الْمَحَلِّ
• A clean material that removes the impurity without harm may be used for wiping; the text uses a cleansing stone as its example.
• Washing with water is better, and the best method described is to wipe first and then wash with water.
• Where wiping alone is legally sufficient, the essential goal is that the place becomes clean.
• Completing three stones is recommended (Mandub) when cleansing has already been achieved with fewer; the text explicitly says the number itself is not an emphasized Sunnah.