It is narrated from Hazrat Umm Qais bint Mihsan. She says: I went to the service of the Prophet Muhammad (peace and blessings be upon him) with one of my sons, and because of a pain in his throat, I had applied a leech to him. The Prophet (peace and blessings be upon him) said: "Why are you strangling your child's throat? Do this treatment. Use this Indian aloeswood (Oud Hindi), for in it is a cure for seven diseases. If there is pain in the throat, it should be inhaled through the nose, and if there is pleurisy, it should be used from the corner of the mouth."