-Anas (may Allah be pleased with him) said: I heard the Messenger of Allah (peace and blessings of Allah be upon him) saying, "Allah, the Glorious and Exalted said : ' When I afflict my slave in his two dear things (i.e., his eyes) , and he endures patiently , I shall compensate him for them with Jannah ."
[ Al- Bukhari ]