According to search-discovered classical Islamic scholarship, the Quran's perspective on the scriptures commonly known as the Old Testament is one of affirmation of origin, followed by correction. The Quran explicitly confirms that God revealed the Tawrat (Torah) to Moses and the Zabur (Psalms) to David, describing them in their original forms as sources of 'guidance and light' (Quran 5:44). However, a central tenet articulated by commentators like Al-Tabari and Ibn Kathir is the concept of tahrif (alteration), which holds that these scriptures have not been perfectly preserved over time. This alteration is understood to be both in text and interpretation. Therefore, the Quran's role is described as that of a 'Muhaimin' (Guardian) over previous books (Quran 5:48), confirming the eternal truths they originally contained (like monotheism), correcting human-introduced distortions, and superseding their laws with a final, universal, and divinely protected legislation.