It is narrated from Sayyiduna Zayd bin Arqam (may Allah be pleased with him), he says: I suffered from an eye ailment, so the Prophet (peace and blessings of Allah be upon him) came to visit me. Then he said: "O Zayd! If the pain in your eyes were to remain, what would you do?" I replied: I would be patient and hope for reward. The Prophet (peace and blessings of Allah be upon him) said: "If your eyes had continued to hurt like this and you had been patient and hoped for reward, then Paradise would have been given to you in exchange for it."