Hadith 693
It is narrated from Umm al-Mu'minin Sayyida Aisha (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) said: "When any of you goes to relieve himself, he should take three stones with him and clean himself with them; that is sufficient."
Hadith 694
‘Umara bin Khuzaymah bin Thabit al-Ansari narrated from his father, Sayyiduna Khuzaymah (may Allah be pleased with him), that the Messenger of Allah (peace and blessings be upon him) said: “(Istinja) should be done with three stones, none of which should be dung.”