Sahih Bukhari Volume 7, Book 70, Hadith Number 555.

Narrated By ‘Ata bin Abi Rabah : Ibn ‘Abbas said to me, “Shall I show you a woman of the people of Paradise?” I said, “Yes.” He said, “This black lady came to the Prophet and said, ‘I get attacks of epilepsy and my body becomes uncovered; please invoke Allah for me.’ The Prophet said (to her), ‘If you wish, be patient and you will have (enter) Paradise; and if you wish, I will invoke Allah to cure you.’ She said, ‘I will remain patient,’ and added, ‘but I become uncovered, so please invoke Allah for me that I may not become uncovered.’ So he invoked Allah for her.”