Shaykh Ubayd حفظه الله regarding using odd number of stones for purification, “if water is not available and If you only find one stone, use three different sides of the same stone. Using Toilet tissue is permissible.”
[Taken from the lessons on “Conditions, Pillars and Obligation of Salah – Shaykh ul Islaam Muhammad bin Abdil Wahhab رحمه الله Explanation by Shaykh Abdul Muhsin al-Abbaad حفظه الله Taught by: Abdulilah Lahmami]