"Once there was an altercation between the Prophet and Hazrat Ayesha when they found Hazrat Abu Bakr as judge. Hazrat Ayesha said to the Prophet: You speak but don't speak except truth. At once Hazrat Abu Bakr gave her such a slap that blood began to ooze out from her mouth".
Sunni reference: Ihya Ulum-id-din by Imam Ghazali, Volume 2 page 36, Chapter "The secrets of marriage", English translation by Maulana Fazlul Karim
Home