فَإِن لَّمۡ يَسۡتَجِيبُواْ لَكَ فَٱعۡلَمۡ أَنَّمَا يَتَّبِعُونَ أَهۡوَآءَهُمۡۚ وَمَنۡ أَضَلُّ مِمَّنِ ٱتَّبَعَ هَوَىٰهُ بِغَيۡرِ هُدٗى مِّنَ ٱللَّهِۚ إِنَّ ٱللَّهَ لَا يَهۡدِي ٱلۡقَوۡمَ ٱلظَّـٰلِمِينَ
But if they answer you not (i.e. do not believe in your doctrine of Islamic Monotheism, nor follow you), then know that they only follow their own lusts. And who is more astray than one who follows his own lusts, without guidance from Allah? Verily! Allah guides not the people who are Zalimun (wrong-doers, disobedient to Allah, and polytheists).
۞وَلَقَدۡ وَصَّلۡنَا لَهُمُ ٱلۡقَوۡلَ لَعَلَّهُمۡ يَتَذَكَّرُونَ
And indeed now We have conveyed the Word (this Quran in which is the news of everything to them), in order that they may remember (or receive admonition).
ٱلَّذِينَ ءَاتَيۡنَٰهُمُ ٱلۡكِتَٰبَ مِن قَبۡلِهِۦ هُم بِهِۦ يُؤۡمِنُونَ
Those to whom We gave the Scripture [i.e. the Taurat (Torah) and the Injeel (Gospel), etc.] before it, - they believe in it (the Quran).
وَإِذَا يُتۡلَىٰ عَلَيۡهِمۡ قَالُوٓاْ ءَامَنَّا بِهِۦٓ إِنَّهُ ٱلۡحَقُّ مِن رَّبِّنَآ إِنَّا كُنَّا مِن قَبۡلِهِۦ مُسۡلِمِينَ
And when it is recited to them, they say: "We believe in it. Verily, it is the truth from our Lord. Indeed even before it we have been from those who submit themselves to Allah in Islam as Muslims (like 'Abdullah bin Salam and Salman Al-Farisi, etc.).