What was the response of Ubai Ibn Ka`b (peace be upon him) when `Umar said that he was the best reciter of the Qur'an, but they would leave some of what he recites?
 Narrated Ibn `Abbas:                     `Umar said, Ubai was the best of us in the recitation (of the Qur'an) yet we leave some of what he recites.' Ubai says, 'PI have taken it from the mouth of Allah's Apostle and will not leave for anything whatever." But Allah said "None of Our Revelations do We abrogate or cause to be forgotten but We substitute something better or similar." 2.106