أَمۡ يَقُولُونَ ٱفۡتَرَىٰهُۖ قُلۡ فَأۡتُواْ بِسُورَةٖ مِّثۡلِهِۦ وَٱدۡعُواْ مَنِ ٱسۡتَطَعۡتُم مِّن دُونِ ٱللَّهِ إِن كُنتُمۡ صَٰدِقِينَ
Or do they say: "He (Muhammad SAW) has forged it?" Say: "Bring then a Surah (chapter) like unto it, and call upon whomsoever you can, besides Allah, if you are truthful!"
بَلۡ كَذَّبُواْ بِمَا لَمۡ يُحِيطُواْ بِعِلۡمِهِۦ وَلَمَّا يَأۡتِهِمۡ تَأۡوِيلُهُۥۚ كَذَٰلِكَ كَذَّبَ ٱلَّذِينَ مِن قَبۡلِهِمۡۖ فَٱنظُرۡ كَيۡفَ كَانَ عَٰقِبَةُ ٱلظَّـٰلِمِينَ
Nay, they deny that; the knowledge whereof they could not compass and whereof the interpretation has not yet come unto them. Thus those before them did deny. Then see what was the end of the Zalimun (polytheists and wrong-doers, etc.)!
وَمِنۡهُم مَّن يُؤۡمِنُ بِهِۦ وَمِنۡهُم مَّن لَّا يُؤۡمِنُ بِهِۦۚ وَرَبُّكَ أَعۡلَمُ بِٱلۡمُفۡسِدِينَ
And of them there are some who believe therein, and of them there are some who believe not therein, and your Lord is All-Aware of the Mufsidun (evil-doers, liars, etc.).
وَإِن كَذَّبُوكَ فَقُل لِّي عَمَلِي وَلَكُمۡ عَمَلُكُمۡۖ أَنتُم بَرِيٓـُٔونَ مِمَّآ أَعۡمَلُ وَأَنَا۠ بَرِيٓءٞ مِّمَّا تَعۡمَلُونَ
And if they belie you, say: "For me are my deeds and for you are your deeds! You are innocent of what I do, and I am innocent of what you do!"