Sahih Bukhari Volume 009, Book 085, Hadith Number 082.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 85. Saying Something under Compulsion (Ikraah)
Narrated By Abu Huraira : Allah's Apostle said, "(The Prophet) Abraham migrated with his wife Sarah till he reached a town where there was a king or a tyrant who sent a message, to Abraham, ordering him to send Sarah to him. So when Abraham had sent Sarah, the tyrant got up, intending to do evil with her, but she got up and performed ablution and prayed and said, 'O Allah ! If I have believed in You and in Your Apostle, then do not empower this oppressor over me.' So he (the king) had an epileptic fit and started moving his legs violently."