أَأُنزِلَ عَلَيْهِ الذِّكْرُ مِن بَيْنِنَا ۚ بَلْ هُمْ فِي شَكٍّ مِّن ذِكْرِي ۖ بَل لَّمَّا يَذُوقُوا عَذَابِ (8)
(38:8) Has this Exhortation been sent down among us only to him, to the exclusion of all others?' Nay, they are in doubt regarding My Exhortation, *10 and are saying all this because they have not yet had any taste of My chastisement.
*10) In other words Allah says: " Muhammad, these people are not belying you but Me. As for your truthfulness, they had never doubted it before; now that they are doubting it, it is because of My Admonition; now that I have entrusted to you the Mission of admonishing them, they have started doubting the truthfulness of the very person whose righteousness and piety they used to swear by " The same theme has also been discussed above in Al-An'am: 33 and E.N. 21 thereof.