And with the Truth, We have sent It, and with the Truth, It is descended; and We have not sent you except as a herald and warner.
All 313 Messengers have been sent down with the Truth and Proof-Adhikr-in order to warn mankind that there is no deity except Lord Allah and so serve Him alone as explained in verse 21: 24-25. Not Arabic Quran, but Adhikr is the Splendid Book in which no falsehood will enter either before or after Its codification as told in verses 41: 41-42. By codifying Adhikr in one’s heart’s language through the Three-Time-Knower mentioned in verse 25: 59, Lord has become the Impartial. So whoever testifies Adhikr, It is for his sake; and if whoever strays from It, it is for her loss as explained in verses 6: 104 and 10: 108. The duty of Messenger and believer is just to convey the Message to entire worlds.
The Arabic Quran reading Fujjar are the true disbelievers who hide and reject Adhikr as explained in verses 4: 150-151. They are the Mujirims who are serving Satan and are following his footsteps as explained in verse 2: 168-169. See explanation 2: 119; 14: 1 and 17: 13-15.