Sahih Muslim | Book 7 | Chapter 11

Narrated by Nubaih b. Wabb
Nubaih b. Wabb reported: We went with Aban b. Uthman (in a state of ihram). When we were at Malal the eyes of Umar b. Ubaidullah became sore and, when we reached Rauba' the pain grew intense. He (Nubaib b. Wahb) sent (one) to Aban b. Uthman to ask him (what to do). He sent him (the message) to apply aloes to them, for 'Uthman (Allah be pleased with him) reported that the Messenger of Allah (may peace be upon him) applied aloes to the person whose eyes were sore and he was in the state of Ihram.

Narrated by Nubaih b Wahb
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.