Naskh (نسخ) is an Arabic language word usually translated as "abrogation"; it shares the same root as the words appearing in the phrase al-nāsikh wal-mansūkh (الناسخ والمنسوخ, "the abrogating and abrogated [verses]"). It is a term used in Islamic legal exegesis for seemingly contradictory material within or between the twin bases of Islamic holy law: the Quran and the Prophetic Sunna. Over the last century, there have come to be serious objections to the very idea of Naskh within the Muslim community; returning to a dissenting attitude from early Muslim history (e.g., Abu Muslim Al-Asfahani 948–1038 C.E) [citation needed].

The emergence of naskh (initially as practice and then as fully elaborated theory) dates back to the first centuries of Islamic civilization. Almost all classical naskh works, for instance, begin by recounting the incident of the Kufan preacher banned from expounding the Quran by an early 'ilmic authority figure (usually 'Alī but sometimes also Ibn 'Abbās) on account of his ignorance of the principles of naskh. Whatever the dubious historicity of such traditions: