﴿ وَمَا كَانَ هَٰذَا ٱلْقُرْءَانُ أَن يُفْتَرَىٰ مِن دُونِ ٱللَّهِ وَلَٰكِن تَصْدِيقَ ٱلَّذِى بَيْنَ يَدَيْهِ وَتَفْصِيلَ ٱلْكِتَٰبِ لَا رَيْبَ فِيهِ مِن رَّبِّ ٱلْعَٰلَمِينَ ﴾

“Now this Qur'an could not possibly have been devised by anyone save God: nay indeed, it confirms the truth of whatever there still remains [of earlier revelations] and clearly spells out the revelation [which comes] -let there be no doubt about it-from the Sustainer of all the worlds.”

Please check ayah 10:40 for complete tafsir.