Lord Allah, there is no Deity except Him; surely He will gather you all together unto the Day of Judgment, no doubt in it, and who is more truthful than Allah in Speech?
All 313 Messengers were sent down with Adhikr to teach mankind that there is no Deity except Lord, and to serve Him alone as explained in verses 21: 24-25. Adhikr is codified as the Best Interpretation of Lord's Book through the Three-Time-Knower mentioned in verse 25: 59. So whoever among the Arabic Quran reading Fujjar hides It, he will be dragged prone on his face into Hell, those are in the worst place, and they are the most strayed as explained in verse 25: 34. The Fujjar are only considering Hadeeth as the deeds and quotes of the Messenger. While Lord has taught through his Messenger: "The Best Speech is the Lord's Book Adhikr".
Lord has also taught through His Messenger: "The peculiarity of Lord's Speech Adhikr upon all other books is just like the peculiarity of Lord upon the whole creatures". It is told in verse 6: 155: "Adhikr is a Blessed Book, We have sent down It; then you follow It, and you become heedful so that you may receive the Mercy". See explanation 2: 213; 4: 78-79 and 6: 153.