سُبْحَانَ ٱللَّٰهِ
Holy Qur'an
Al-Qur'an
Kids Qur'an
This is an allusion to efforts aimed at discrediting the Qur'an by describing it as "invented" by Muhammad for his own - personal and political - ends, as a series of "misunderstood quotations" from earlier scriptures, as the result of "hallucinations", and so forth: all of which implies that the opponents of the Qur'anic message instinctively feel its force, realizing at the same time that it endangers their self-complacent, materialistic outlook on life and ought, therefore, to be combatted. This explains the statement, at the end of verse {28}, that they "knowingly reject" God's messages.
A favourite trick of those who wish to dishonour Revelation is, not only not to listen to it themselves, but to talk loudly and insolently when it is being read, so that even the true listeners may not be able to perform their devotions. They think that they are drowning the voice of Allah: in fact they are piling up misery for themselves in the future. For Allah's voice can never be silenced.