From Sahih Bukhari (Hadith 5692):
Narrated Um Qais bint Mihsan:I heard the Prophet (ﷺ) saying, "Treat with the Indian incense, for it has healing for seven diseases; it is to be sniffed by one having throat trouble, and to be put into one side of the mouth of one suffering from pleurisy." Once I went to Allah's Messenger (ﷺ) with a son of mine who would not eat any food, and the boy passed urine on him whereupon he asked for some water and sprinkled it over the place of urine
Reference: Bukhari 5692