It is narrated from Hazrat Umm Qais bint Mihsan that once I brought my child, who had not yet started eating or drinking, to the service of the Prophet (peace be upon him). The child urinated on the Prophet (peace be upon him), so the Prophet (peace be upon him) called for water and sprinkled it on that spot. Then, when I brought my son again, I was holding him by the throat. The Prophet (peace be upon him) said, "Why do you strangle and cause pain to your children by holding them by the throat like this? Use Indian costus (Qust Hindi), for in it there is a cure for seven diseases, one of which is pleurisy (dhat al-janb). 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."