Abrogation is applicable to both sources of Islamic law: the Qur'ān and the Prophetic Sunna. A Qur'ānic verse may abrogate another Qur'ānic verse, and a Prophetic Sunna may likewise abrogate another Prophetic Sunna. The possibility of abrogation between these two sources, though, was a more contentious issue precipitated by the absence within a source of the appropriate abrogating (nāsikh) or abrogated (mansūkh) material necessary to bring concordance between it and the Fiqh.