21:108
قُلْ إِنَّمَا يُوحَىٰٓ إِلَىَّ أَنَّمَآ إِلَـٰهُكُمْ إِلَـٰهٌۭ وَٰحِدٌۭ ۖ فَهَلْ أَنتُم مُّسْلِمُونَ ١٠٨
Saheeh International
Say, "It is only revealed to me that your god is but one God; so will you be Muslims [in submission to Him]?"
Tafsir of "Ibn Kathir" (English)
The main Objective of Revelation is that Allah be worshipped Allah commands His Messenger:قُلْSay:i.e. say to the idolators:إِنَّمَا يُوحَى إِلَيَّ أَنَّمَا إِلَهُكُمْ إِلَهٌ وَاحِدٌ فَهَلْ أَنتُم مُّسْلِمُونَ"It is revealed to me that your God is only one God. Will you then be Muslims!"meaning, will you then follow that and submit to it!