Ahmad ibn al-Husayn narrated from Hammad ibn ‘Isa, from Hariz, from Zurara.
He (Narrator) said: “He (Zurara) used to perform istinja’ (cleaning after relieving oneself) from urine by washing three times, and from feces using clay or pieces of cloth.”
Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 376