Sayyiduna Qatadah bin al-Nu'man (may Allah be pleased with him) said: A bow was given to the Messenger of Allah (peace and blessings be upon him) as a gift, and he (peace and blessings be upon him) gave it to me on the day of the Battle of Uhud. I shot with it in front of the Messenger of Allah (peace and blessings be upon him) until it broke at its tip. I stayed in my place in front of the face of the Messenger of Allah (peace and blessings be upon him), receiving the arrows with my face. Whenever an arrow veered toward the face of the Messenger of Allah (peace and blessings be upon him), I would bend my head toward it to shield the face of the Messenger of Allah (peace and blessings be upon him), while I had no arrow left to shoot. The last of them was an arrow by which my eyeball came out onto my cheek. When the crowd dispersed, I took my eyeball in my palm and ran with it in my palm to the Messenger of Allah (peace and blessings be upon him). When the Messenger of Allah (peace and blessings be upon him) saw it in my palm, his eyes filled with tears, and he (peace and blessings be upon him) said: "O Allah, Qatadah has shielded the face of Your Prophet with his own face, so make it the better of his two eyes and the sharper of them in sight." And so it became the better of his two eyes and the sharper of them in sight.
Hadith Referenceالمعجم الكبير للطبراني / باب القاف / 16062