Bring me stones so that I may cleanse (my private parts) therewith, but do not bring any bones or animal dung

Abu Hurayrah was walking behind the Prophet (may Allah's peace and blessings be upon him) while he was carrying a pot for the Prophet's ablution and cleansing purposes (from impurity). The Prophet (may Allah's peace and blessings be upon him) commanded him to bring him some stones which he could use to cleanse himself after answering the call of nature. He instructed him not to bring any bones or animal dung.

So Abu Hurayrah brought him some stones in the corner of his garment, put them next to him, and then left. When the Prophet (may Allah's peace and blessings be upon him) had answered the call of nature, Abu Hurayrah asked him why he did not want to use bones and animal dung to cleanse himself with. The Prophet (may Allah's peace and blessings be upon him) told him that they were from the food of the Jinn.

A delegation from the Jinn of Nasībayn — a famous city between Syria and Iraq — had once visited the Prophet, who lauded them, and asked him for food. So the Prophet (may Allah's peace and blessings be upon him) prayed that they would find food on any bones and animal dung that they would ever pass by. The meaning of this was further specified and clarified in Sahīh Muslim: "For you is each bone on which the name of Allah is mentioned.

When it falls in your hand, it will have plenty of flesh; and each piece of dung is fodder for your beasts."