Belief in God's revealed books (divine scripts) is one of
the articles of faith. The Holy Quran declares this belief as an act of
righteousness by saying:
"It is righteousness to believe in God and the Last Day and the angels and the books and the messengers."
This means that a Muslim cannot be a righteous and true
believer without having true faith not only in the Quran but also in all other
scriptures revealed previously. The Quran mentions the names of the revealed
books of Moses, David, and Jesus Christ, and mentions some Suhuf (scriptures)
revealed to others including Abraham, David, and Moses, the Quran says:
"And to David we gave the Psalm (Zabur)." (17:55, 4:16). "We sent after them Jesus the son of Mary, and bestowed on him the Gospel (Injil)... ... (57:17).
Moses received the Law (Torah) which the Quran mentions as:
Finally, the last messenger of God received the final and
universal message of God, which was not for one particular people or a
particular era, but for all times to come. The Quran is bound to remain immune
to any such corruption, and the Quran itself says:
"We have, no doubt, sent down the message and we will assuredly guard it (from corruption)." (15:9).
Thus belief in the Holy Quran is indeed a belief in the earlier
revelations because the Quran confirms these earlier scriptures. The Quran is
supreme in the sense that it was sent down to the last messenger, and its
teachings are to serve the whole of humankind for all times, and for all
places.