What did the Prophet Muhammad (peace be upon him) do to treat Umar b. Ubaidnllah b. Ma'mar's swollen eyes?
 Nubaih b Wahb reported that the eyes of Umar b. Ubaidnllah b. Ma'mar were swollen, and he decided to use antimony. Aban b. 'Uthman forbade him to do so and commanded him to apply aloes on them, and reported on the authority of 'Uthman b. Affan that the Apostle of Allah (may peace be upon him) had done that.