Costus: Indian Aloe Wood

Anas, Allah be pleased with him, narrated that Allah's Messenger, may the peace and the blessings of Allah be upon him, said: " Some of the best treatments lie in cupping and Kistroot ( Indian aloe wood) ." 
Reported in Sahih Muslim and Sahih Al Bukhaaree, Cf. Cauterization and Cupping, VI; Venesection and Cauterization , VII 

Narrated Umm Qais, Allah be pleased with her: 

I went to Allah's Apostle along with a a son of mine whose palate and tonsils I had pressed with my finger as a treatment for a (throat and tonsil) disease. The Prophet said, "Why do you pain your children by pressing their throats! Use Oud Al-Hindi ( Indian aloe wood) for it cures seven diseases, one of which is pleurisy. It is used as a snuff for treating throat and tonsil disease and it is inserted into one side of the mouth of one suffering from pleurisy." 
Sahih Al Bukhaaree, Book of Medicine  no. 5343

Nose drops made of Indian costus may be used to annoy stubborn jinn [who has possessed a person and is not easily expelled]. The patient should take it in through the nose, so that the costus goes straight to the brain where the jinn is located, and he will be greatly annoyed by it, so much so that he will not be able to bear it and will hasten to flee, or he will talk to the practitioner and promise to leave and not come back. The Sunnah mentions the virtues of Indian costus, such as in the report narrated by Al-Bukhaari (may Allah have mercy on him) in his Saheeh:


In Fath Al-Baari, Ibn Hajar described how to use Indian costus. He said: The patient should be made to lie on his back, and something should be placed beneath his shoulders in order to raise them, so that his head will be tipped back. Drops of olive oil mixed with costus should then be placed in his nose so that they may reach the brain and whatever sickness is present may be expelled by sneezing.

Note: You may buy them from ebay or your nearest Chinese medicine shop