The above is the meaning of the Quran 4: 82.
More explanation is in the link:
Won't they contemplate about the Quran revelations [or ayat], and their fluency and eloquence, so as to know that they cannot bring about any book like it, so they will know that it is not the word of any human, but the Quran is the word of God Almighty.
Moreover, if the Quran had been from [anyone] other than God, they would have found in it much variation [from the Bible concerning the commandment of ‘the exclusive devotion to God alone’ and discarding the idols.]
In other words, the Quran is like the Torah (included in the First Commandment), concerning the monotheism and the exclusive devotion to God Almighty.
The Commandment which is most important of all the other commandment is to worship God alone, without taking any other god besides Him.
In this respect, the Quran is similar to the Torah inscribed on the Tablets of stone: that you should not worship anything or anyone other than God alone, and to discard the statues and idols of any sort.
In fact, the Quran as a whole from the first letter to the last letter is concerned with this First Commandment.