Narrated Ibn Abbas:
Umar said, Ubayy was the best of us in the recitation (of the Qur'an) yet we leave some of what he recites. Ubayy says, "I have taken it from the mouth of Allah's Messenger (ﷺ) and I will not leave it for anything." But Allah said "None of Our Revelations do We abrogate or cause to be forgotten but We substitute something better or similar." (Quran 2:106)