Musnad Ahmad Hadith 27004

It is narrated from Umm Qais bint Mihsan (may Allah be pleased with her) that once I brought my child, who had not yet started eating or drinking, to the service of the Prophet (ﷺ). The child urinated on the Prophet (ﷺ), so the Prophet (ﷺ) called for water and sprinkled it on that spot. Then, when I brought my son again, I had lifted his throat. The Prophet (ﷺ) said: "Why do you strangle and trouble your children by lifting their throats like this? Use Indian costus (Qust Hindi), for in it there is a cure for seven diseases, one of which is pleurisy. In case of throat swelling, Qust Hindi should be dropped into the nose, and in case of pleurisy, it should be dropped at the side of the mouth."