Ibn Mas'ood said: "The Messenger of Allaah said: "One the jinn called me, and I went with him and recited Quran for them.' He took me and showed me the traces of where they had been and the traces of their fires. They (his fellow jinn) asked him for food and he said: "You can have every bone on which the name of Allaah has been mentioned that comes into your possession, as meat, and all the droppings as food for your animals." The Prophet said, "So do not use [these things] for cleaning yourselves [after relieving oneself], for they are the food and provision of your brothers.'" [Muslim]