'And recite what was revealed to you from the Book of your Lord. There is no changing His words, and you will find no refuge except in Him' (Surah al-Kahf verse 27)
'Those to whom We have given the Scripture follow it, as it ought to be followed—these believe in it. But as for those who reject it—these are the losers' (Surah al-Baqarah verse 121)
'While those who believe, and work righteousness, and believe in what was sent down to Muhammad—and it is the truth from their Lord—He remits their sins, and relieves their concerns' (Surah Muhammad verse 2)
'He who created death and life—to test you—as to which of you is better in conduct. He is the Almighty, the Forgiving' (Surah al-Mulk verse 2)