What was the response of the Prophet Muhammad (saw) when Ubai bin Ka`b asked him about the two Mu'awwidh-at?
 Narrated Zirr bin Hubaish:                     I asked Ubai bin Ka`b, "O Abu AlMundhir! Your brother, Ibn Mas`ud said so-and-so (i.e., the two Mu'awwidh-at do not belong to the Qur'an)." Ubai said, "I asked Allah's Apostle about them, and he said, 'They have been revealed to me, and I have recited them (as a part of the Qur'an)," So Ubai added, "So we say as Allah's Apostle has said."