21:108
قُلْ إِنَّمَا يُوحَىٰٓ إِلَىَّ أَنَّمَآ إِلَـٰهُكُمْ إِلَـٰهٌ وَٰحِدٌ ۖ فَهَلْ أَنتُم مُّسْلِمُونَ
Say, "It is only revealed to me that your god is but one God; so will you be Muslims [in submission to Him]?"
The Prophets
قُلْ إِنَّمَا يُوحَىٰٓ إِلَىَّ أَنَّمَآ إِلَـٰهُكُمْ إِلَـٰهٌ وَٰحِدٌ ۖ فَهَلْ أَنتُم مُّسْلِمُونَ
Say, "It is only revealed to me that your god is but one God; so will you be Muslims [in submission to Him]?"
Nearby ayahs help place verse 21:108 in sequence and meaning.
إِنَّ فِى هَـٰذَا لَبَلَـٰغًا لِّقَوْمٍ عَـٰبِدِينَ
Indeed, in this [Qur'an] is notification for a worshipping people.
وَمَآ أَرْسَلْنَـٰكَ إِلَّا رَحْمَةً لِّلْعَـٰلَمِينَ
And We have not sent you, [O Muhammad], except as a mercy to the worlds.
فَإِن تَوَلَّوْا۟ فَقُلْ ءَاذَنتُكُمْ عَلَىٰ سَوَآءٍ ۖ وَإِنْ أَدْرِىٓ أَقَرِيبٌ أَم بَعِيدٌ مَّا تُوعَدُونَ
But if they turn away, then say, "I have announced to [all of] you equally. And I know not whether near or far is that which you are promised.
إِنَّهُۥ يَعْلَمُ ٱلْجَهْرَ مِنَ ٱلْقَوْلِ وَيَعْلَمُ مَا تَكْتُمُونَ
Indeed, He knows what is declared of speech, and He knows what you conceal.