(17) باب الاِسْتِطَابَةِ
Jabir reported:
The Messenger of Allah (ﷺ) forbade the use of bone or the droppings of camels for wiping (after excretion).
Reference: Sahih Muslim 263
In-book reference: Book 2, Hadith 75
USC-MSA web (English) reference(deprecated numbering scheme): Book 2, Hadith 506