Abd al-Rahman bin Abd al-Wahid said: I heard Sayyiduna Anas bin Malik (may Allah be pleased with him) say that the Messenger of Allah (peace and blessings be upon him) said: "Clean yourselves with three stones, and clean with earth when one does not find a stone; and a thing with which one has cleaned oneself once should not be used for cleaning again."
Uthman al-Tara'ifi has been criticised, and he narrates from unknown people. And Allah knows best. It has also been narrated by another route from Anas, and it is not authentic.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 541