On the Islamic Doctrine of Abrogation

A couple of helpful articles on the Islamic concept of abrogation.

• Farooq Ibrahim - The Problem of Abrogation in the Quran
• Abdullah Al Araby - The Quran's Doctrine of Abrogation

Whatever communications We abrogate or cause to be forgotten, We bring one better than it or like it. Do you not know that Allah has power over all things?
(Surah Al Baqarah, 2:106)

And when We change (one) communication for (another) communication, and Allah knows best what He reveals, they say: You are only a forger. Nay, most of them do not know.
(Surah An Nahl, 16:101)