Nabiyah bin Wahb narrates: At the place of "Milal," Umar bin Ubaidullah developed an eye ailment while he was in the state of Ihram. He sent a message to Aban bin Uthman and asked him: With what should he treat it? So Aban bin Uthman said: Apply sabr (a specific type of herb) on it, because I heard Sayyiduna Uthman bin Affan (may Allah be pleased with him) narrate from the Prophet Muhammad (peace and blessings be upon him) that the Prophet (peace and blessings be upon him) said: "A man should apply sabr (a specific type of herb) on it."