
The Quran is Complete
The Quran makes it clear that the Word of God is complete in the Quran.
As it says in surah 6 verse 115:
وَتَمَّتْ كَلِمَتُ رَبِّكَ صِدْقًا وَعَدْلًا لَّا مُبَدِّلَ لِكَلِمَاتِهِ وَهُوَ السَّمِيعُ الْعَلِيمُ
Watammat kalimatu rabbika sidqan waAAadlan la mubaddila likalimatihi wahuwa alssameeAAu alAAaleemu