1. Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from ibn Bukayr who has said the following: “Zurarah once asked abu ‘Abd Allah عليه السلام, about foxes, fennec and squirrel and so on of hair. He (the Imam) then took out a book that he (the Imam) thought was of the dictations of the Messenger of Allah and it said, ’Salah (prayer) performed with hair of everything of inedible flesh is unlawful. Thus, Salah (prayer) performed with the fur, hair, skin, urine, dung, milk and with everything from such animals is invalid and unacceptable until one performs with something else which Allah has made of edible flesh.’ He (the Imam) then said, ‘O Zurarah, this is from the Messenger of Allah; preserve it. O Zurarah, if it is from edible animal, performing Salah (prayer) with its fur, urine, hair, dung, milk and everything from it is permissible, if you know that proper slaughtering has taken place, which makes it clean. If it is from something which is not made lawful for you to consume as food but is made unlawful, performing Salah (prayer) with it is invalid, regardless if slaughtered properly or not.’”